In a study of government financial aid for collegestudents, it becomes necessary to estimate the percentage offull-time college students who earn abachelor's degree in four years or less. Find the sample size needed to estimate that percentage. Use a 0.04 margin of error and use a confidence level of 95%. Complete parts(a) through(c) below.

a. Assume that nothing is known about the percentage to be estimated.

n=_ (Round up to the nearestinteger.)

b. Assume prior studies have shown that about 45% of full time of students earn bachelor's degrees in four years or less.

n=_ (Round up to the nearestinteger.)