Which of the following choices can be considered binomial random variables? Choose all answers that apply:

a. Census data from 2010 showed that 50.8% of the US population was female. Select an SRS of 5 people from this population and let U = the number of females in the sample.
b. A certain bus is late to its final daily stop on 20% of days. Take an SRS of 5 days, and assume each day is independent. Let V the number of days the bus is late to its final stop.
c. Flip a fair coin 5 times. Let T = the number of times the coin lands showing "heads".