solve the following problems.

SOLVE THE FOLLOWING PROBLEMS Problem 1. The heights of OSHS male students in your school are normally distributed with a mean of 156 cm and standard deviation of 10 cm. Describe the sampling distribution of 20 students who are randomly drawn from this population. Problem 2. The scores of individual students on a national achievement test have a normal distribution with mean 20.8 and a standard deviation of 1.9. At Feliciano Delos Santos High School, 84 students took the test. If the scores of students at this school have same distribution as national scores, how will you describe the sampling distribution of the scores of these students? Assume that the population is infinite. Problem 3. The average rating of a public senior high school students in a certain division of region of NCR is 85% with standard deviation of 3. a. If a student is selected, what is the probability that his average rating is greater than 80%? b. If a random sample of 20 senior high school students is selected, what is the probability that the average rating is less than 80%