#A Business Analytics graduate is applying for nine jobs, and believes that she has in each of the nine cases a constant and independent 0.48 probability of getting an offer. Write R codes to solve the following two questions:

a. What is the probability that she will have at least three offers? (6 points

b. If she wants to be 95% confident of having at least three offers, how many jobs should she apply for? (6 points)