please help:

Question 1: A low resting heart rate generally implies better cardiovascular tness. Consider the following data on the resting heart rates (beats per minute) for a random sample of eight professional athletes: 47 62 49 52 50 45 44 55 a) Calculate a point estimate of the mean resting heart rate of all professional athletes. [4 pts] b) Calculate a point estimate of the resting heart rate that separates the lowest 50% of all professional athletes from the highest 50%. [4 pts] 0) Calculate the point estimate of the proportion of all professional athletes whose resting heart rate exceeds 50 beats per minute. [4 pts]