During the pandemic crisis, Vincent is trying to earn extra money by working as a dropship agent. For a monthly sale, he will get paid RM3 for each sale he makes if the number of sales is 30 or less. For sales between 31 to 60, he will be paid RM4.50 for each sale. If he manages to sell for more than 60, he will be paid RM6 per sale plus a bonus of RM50.
a) Construct the piecewise functions for the problem.