please help me answer this and show all the work. if you use a financial calculator please show all the steps

A 2-year project has the following cash flows: I=$4;C1=+$2;C2=$2. 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. 8 points QUESTION 7 A 3-year project has the following cash flows: I=$4;C1=+$6;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. A 2-year project has the following cash flows: I=$4;C1=+$2;C2=$2. 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. 8 points QUESTION 7 A 3-year project has the following cash flows: I=$4;C1=+$6;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