I'm having trouble figuring out the margin of error for sample number 2.

UI Previous Problem Problem List Next Problem (25 points) Three separate random samples of students (one sample selected from each of three different colleges) were selected in order to estimate the population percentage of students at each college who are sophomores. Sample 1: 140 students were selected from among all those attending college number 1 and 30 of them were found to be sophomores. Sample 2: 65 students were selected from among all those attending college number 2 and 10 of them were found to be sophomores. L Sample 3: "The sample from college number 3 showed that 30% of students were sophomores with a margin of error of (plus or minus) l ; 10%. '. (NOTE: You should only enter numbers in the blanks provided. For example. to enter '20%' you would type '20' in the blank.) . . i 1' (a) It sample 1 is used to estimate the population percentage of students at college number1 who are sophomores, what is the margin ' of error? I ' Enter the margin of enor as a percentage rounded to one decimal place: E5 percent. Ii _ '' | r i I i i (b) if sample 2 is used to estimate the population percentage of students at college number 2 who are sophomores, what is the margin ' of error? . ' Enter margin of error as a percentage rounded to one decimal place: [:] percent. ' ' ! l i i i (c) if sample 3 is used to estimate the population percentage of students at college number 3 who are sophomores. then an interval that = \"almost oertainir' contains the true population percentage is: percent to percent. (Enter lower-bound in 'I first blank and upper-bound in second blank.) . l