How do I do this? Do I use the semicircle area formula i.e. A = 1/2(pi*r^2) and the triangle area formulas? Could someone please guide me step by step? Thank you.

The rate, in calories per minute, at which someone burns calories using a particular weight machine is modeled by the graph shown: 10 cn Calories Per Minute CO 0- 2 3 5 6 7 8 9 10 Time in Minutes How many calories were burned for 1 s x s 7? Round to the nearest calorie. O 14 calories O 28 calories O 42 calories O 49 calories