WILL MARK BRAINLIEST FOR WHOEVER CAN ANSWER ALL QUESTIONS CORRECTLY FIRST AND CAN SHOW WORK.

a. A representative of a new credit card company wants to know the average credit card balance of all students who have credit cards at a particular college. The representative surveys 15 credit card holders on the college campus. He finds that their balances, to the nearest dollar, are 214, 38, 0, 0, 626, 400, 0, 297, 712, 54, 315, 288, 416, 495, and 93. What is the estimate, to the nearest dollar, of the average credit card balance of all credit card holders at the college?

b. There are 1452 members in a mountaineering club. The club's secretary surveys 44 randomly selected members and finds that 37 members are in favor of holding a used-gear sale. What is the estimated number of club members who would be in favor of holding a used-gear sale?

C. In a region where 48% of the population is male, there are 11 males and 14 females in a sample of residents of the region. What are p and p^ for males and p and p^ for females?​