4. A deck of 100 cardsnumbered 1, 2, . . . . IOUis shufed and then turned over one card at a time. Say that a \"hit\" occurs whenever card i is the ith card to he turned over, i : 1. . . . , 100. Write a simulation program to estimate the expectation and variance of the total number of hits. Run the program. Find the exact answers and compare them with your estimates