Answer the questions please

8. A food company receives complaints normally at a rate of 1.5 times per month. If there is a serious problem the number of calls rise to a rate of 6 per month. Is a binomial or Poisson random variable better to model the number of calls? Why? In computing grade point average (GPA) an A receives 4 points, a B receives 3 points, a C receives 2 points, a D receives 1 point, and there are no points for an F. One student gets an A in a 4-credit class, a grade of B in two 3-credit courses, a C in a 2-credit class and an Fina 1- credit course. What is the student's GPA for these 5 classes