D C In a study of government financial aid for college students, it becomes necessary to estimate the percentage of full-time college students who earn a bachelor'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 A level of 95% Complete parts (a) through (c) below. T a. Assume that nothing is known about the percentage to be estimated. n = 601 V (Round up to the nearest integer.) ed b. Assume prior studies have shown that about 55% of full-time students earn bachelor's degrees in four years or less n = (Round up to the nearest integer)