please help Thank you

CIS 2033 Computational Prob. and Stat. Homework 5 You do not et full-credit if ou do not show our work. (3 pts) An employee at the library has to check the functionality of the printers in the building. Suppose the 6% of printers have defects, and the defects occur independently of one another. a. Find the probability that exactly 3 out of 25 printers have a defect. b. Find the probability that the employee has to check at least 6 computers to nd 2 defective ones. (4 pts) Suppose that Windows is installed in SERC, and it is used by random students in a random order. Given that 15% of users do not close Windows properly, nd the following: a. How many students, on average, do not close Windows properly before someone does close it properly. (Hint: solve for the case is which someone closes it properly, and then the case in which someone does not.) b. What is the probability that 7 out of the next 10 people close Windows properly? (3pts) Suppose temple students send emails at random times, with an average of 10 emails per hour. a. What is the probability that they send at least 6 emails in the next hour? b. What is the probability that they send exactly 6 emails in the next hour