7. Sam is saving money to buy a new cell phone. For the first five weeks, he saves $100 a week. For the next three weeks, he is not able to save any additional money. Sam then saves an additional the $50 a week from the 8th week to the 16th week. Answer all questions that follow. Using the graph below, make graph of the situation. Let m represent the month and let A(m) represent the amount of money save. 1000 950 000 -850 800 750 700 650 600 550 500 450 400 350 300 250 200 -150 100 -50 2-1.8 m, months 10 11 12 13 18 17 18 19 20 21 22 Determine a piecewise linear function for A(m) as a function of the number of months, m, Sam has been saving money. There should be three formulas. The first two are relatively simple, while the third might take additional thinkin