I am so confused on how to solve for circuits

he first time. He was Recently released from state prison where he served an 18-year term for murder and armed robbery. His visit is part of a plan for aftercare arranged by the HIV Liaison Nurse in the prison. He denies practicing any behaviors that could put him at high risk for HIV disease, including having had sex with men or injecting drugs, while in prison or before he was imprisoned. He was first diagnosed with HIV infection five years ago. Mr. J.D. was married before he was arrested, but he was divorced 15 years ago. Although he has two adult children, Mr. J.D. has no contact with his children or former wife. He believes that they moved out of state. His parents are both deceased. He also lost contact with his five brothers and sisters. Currently, Mr. J.D. lives in a short-term, subsidized, group residence for newly released inmates. While in prison he completed high school and earned a GED diploma. In prison he also learned basic computer skills and answered telephone calls for the state's tourist bureau, which was staffed by inmates. He plans to enroll in a community college to learn more about computers. He has job interviews scheduled for several telemarketing companies. His medical history is unremarkable except for sexually transmitted diseases. Shortly after he was arrested he was diagnosed and treated for urethral gonorrhea. His physical examination is Unremarkable. 1. Read the case and Identify biological variables. 2. Identify Psychological variables. 3. Identify Social variables Case – 2 Jane is a middle class American housewife and a bar attender. She is a HIV infected woman who feels isolated and experiences’ shame and stigma in the community she is living. Her economic and social resources are inadequate to meet her needs. She has three children and her role as care giver, wife and mother is lost or limited. She fears transmitting HIV to her family members by contact. She is depressed and confused to disclose her illness to children. She feels disappointed for the loss of reproductive choice due to some gynecological problems associated with HIV. Her husband is a drug addict and jobless, dependent on the family. 1. Read the case and Identify biological variables. 2. Identify Psychological variables. 3. Identify Social variables Case – 3 A 65year old HIV couple from Thailand is living alone in a suburban village with no family support available. . They were depressed due to isolation, internalized shame and perceived stigma. They have several issues with health such as sleeping problems, Arthritis, Diabetes. Sometimes the couple was reluctant for medication due to many medicines in a day. They are confined to home due to mobility problems. Though they are covered under Social security system but it is not sufficient to fulfil their needs due to rising medical needs. 1. Read the case and Identify biological variables. 2. Identify Psychological variables. 3. Identify Social variables Case - 4 Kathy met a man, he was charming and handsome. They talked for hours the first night they met. She told him about her last relationship and how it ended with the police taking her boyfriend away after he brutally attacked her. The charmer told her, that he had been single for many years after his partner died of AIDS. She asked him straight up what his HIV status was and he told Kathy "he was clean and healthy". They began seeing each other regularly. She was falling for this guy and him for her. They played safe at first. But as time passed and their relationship grew stronger and began to relax. They had an active social life and enjoyed each other and going out with friends. Life was very good until February 11, 2010. She discovered a hospital document that had her partners name on it. The document was mixed in with some old holiday cards he had collected and saved over the years. The paper was dated 2002 and stated her partner was HIV poz and had been for 10 years prior. She was devastated! Over the 2+ years they we were together and had the 'HIV poz' conversation many times and he always said how happy he was to be 'clean'. Kathy was tested 2 days later and the results came back positive. Kathy moved out that afternoon- it was her birthday. I am heart broken, confused and angry. Being lied to by someone she loved so much just adds to the pain of having to deal with the news of being HIV poz. 1. Read the case and Identify biological variables. 2. Identify Psychological variables. 3. Identify Social variables

lity... "As part of a probability experiment, Elliott is to answer 4 multiple-choice questions. For each question, there are 3 possible answers, only 1 of which is correct. If Elliott randomly and independently answers each question, what is the probability that he will answer the 4 questions correctly?" Solving the question I keep getting 1/256. My reasoning is that each question has a 1/4 chance of being right if you guessed, so 1/4 x 1/4 x 1/4 x 1/4 = 1/256. But my answer choices are as follows, with the correct answer being E: A. 27/81 B. 12/81 C. 4/81 D. 3/81 E. 1/81 Am I missing something? Or am I just completely solving this wrong?