4.Calculate pay in the following cases- 2+4+3= 10 marks a) Mark works at a rock concert selling programs. He is paid $20 for showing up, plus 45 cents for each program that he sells. He sells 200 programs. How much does he earn working at the rock concert? b) Mary wood is an architect working for New Horizons. She makes every month a salary of 5500. i What is her annual income? ii What is her gross earnings per pay period. iii How much does she earn per period if paid semi-monthly iv How much does she earn per period if paid weekly. c) Danny Keeper is paid $12.50 per hour. He worked 8 hours on Monday and Tuesday, 10 hours on Wednesday and 7 hours on Thursday. Friday was a public holiday and he was called in to work for 10 hours. Overtime is paid time and a half. Time over 40 hours is considered as overtime. Calculate regular salary and overtime. Show all of your work