1 A):- The amount of time devoted to studying Statistics each week by students who achieve a grade of A in the course is a normally distributed random variable with a mean of 7.5 hours and a standard deviation of 2.1 hours. a):- What is the probability a student study for more than 10 hours per week? b):- Find the probability that student spends between 7 and 9 hours studying? c):- What proportion of students spends less than 3 hours studying? B):- How to draw a sample when sampling is done by simple random sampling. Q.2 A):- A population consist of N=5 numbers 5, 9, 13, 15, 17. Draw all possible samples of size n=3 with replacement from the population and find the sample means. Construct the sampling distribution of sample means and verify your results. B):- Ten percent of the 1.5 kg boxes of sugar in a warehouse are underweight. Suppose a retailer buys a random sample of 14 of these boxes. What is the probability that at least 4 percent of the sample boxes will be underweight