The following table shows the number of students in three different degree programs and whether they are graduate or undergraduate students:

a.      Calculate the overinvolment ratio (use 2 digits after decimal point) to measure effect of being undergraduate student on majoring in Engineering. 

b.      What is the probability of selecting a graduate student, given that this student is studing engineering?(use 2 digits after decimal point) 

c.      If we randomly select 4 students (with replacement) who are studing engineering, what is the probability that none of them are undergraduate?(use 5 digits after decimal point) 

d.      If we randomly select 2 students (without replacement) who are studing engineering, what is the probability that none of them are undergraduate?(use 4 digits after decimal point)