Marigold's friend Amital is taking a similar test, but it is online. The way
Amital's test works, the student keeps answering questions until they get one
right, at which point the exam ends. Like Marigold, Amital is guessing on every
problem, and has a probability of 1/4
each question right. Assume her guesses are independent of each other.
Please round your answers to three decimal places

A. What is the probability Amital answers only one question? Correct
B. What is the probability Amital answers 10 questions? Incorrect
C. What is the expected number of questions Amital has to answer? Correct
D. What is the SD?