i need help with a pre lab about optics

Please solve the following in the pre lab.

1- part (e) in question 1.

2- Question 2 ( All parts)

3- Question 3 ( All parts)

In question 3, please use group number 1 and 2 in solving the problem.

You can solve the problems on a separate sheet. If you choose to hand write it, please use clear hand writing.

I will attach couple lectures that may help in solving the problems. The pre lab sheet is attached.