A low resting heart rate generally implies better cardiovascular fitness. 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

1)Calculate a point estimate of the mean resting heart rate of all professional athletes.

2) Calculate a point estimate of the resting heart rate that separates the lowest 50% of all professional athletes from the highest 50%

3)Calculate the point estimate of the proportion of all professional athletes whose resting heart rate exceeds 50 beats per minute.