I need help figuring out part 3 for this problem.

Future scientists: Education professionals refer to science, technology, engineering, and mathematics as the STEM disciplines. A research group reported that 28% of freshmen entering college in a recent year planned to major in a STEM discipline. A random Is it appropriate to use the normal approximation to nd the probability that less than 31% of the freshmen in the sample are planning to major in a STEM discipline? It [E] appropriate to use the normal curve, since np = -_10 am >= sample of 90 freshmen is selected. Round the answer to at least four decimal places. Find the probability that less than 31% of the freshmen in the sample are planning to major in a STEM discipline? The probability that less than 31% of the freshmen in the sample are planning to major in a STEM discipline is 0.7369 . A new sample of 140 freshmen is selected. Find the probability that less than 30% of the freshmen in this new sample are planning to major in a STEM discipline. The probability that less than 30% of the freshmen in the sample are planning to major in a STEM discipline is E]