4. "For many people, being left alone with their thoughts is a most undesirable activity," says a psychologist involved in a study examining reactions to solitude. In the study, 146 college students were asked to hand over their cell phones and sit alone, thinking, for about 10 minutes. Afterward, 76 of the participants rated the experience as unpleasant. a) Use this information to estimate the proportion of all college students who would find it unpleasant to sit alone with their thoughts. Round to two decimal places as needed. Use correct notation. (This reaction is not limited to college students: in a follow-up study involving adults ages 18 to 77, a similar outcome was reported.) b) Give notation for the quantity being estimated, and define any parameters used in a complete sentence. c) Give the point estimate, and use correct notation. d) Give a 95% confidence interval for the quantity being estimated, given that the margin of error for the estimate is 6%. Interpret the meaning of this interval in a complete sentence with correct units