Each week a builder makes an order of doors from a supplier. The doors normally cost $60 each, but the supplier gives a 10% discount for any order of 30 or more doors. The orders for the first 8 weeks of the year are given in the vector:

Orders = [20 40 15 30 25 45 10 35]

(a) Write a MATLAB program using a for loop and if statement to find the total cost of the doors ordered.

(b) Extend your program using the find command to find which weeks the builder obtained a discount.