QUESTION 7 A 3-year project has the following cash flows: I = -$4; C1 = +$8; C2 =-$1; C3 = +$9. Use the triangle method to compute the bottom row; i.e., the row below the horizontal line. What is the sum of all the numbers in the bottom row? Give the answer as an integer. QUESTION 8 A 4-year project has the following cash flows: I =-$3; C1 = +$6; C2 = $5; C3 = +$3; C4 =-$9. Use the triangle method to compute the bottom row; i.e., the row below the horizontal line. What is the sum of all the numbers in the bottom row? Give the answer as an integer