The following is a skeleton (or empty) flowchart for a program that calculates and displays the average temperature for a week. The temperatures are T1, T2, T3, T4, T5, T6, and T7. If the average temperature of the 7 days is less than or equal to 20 degrees, the program should also print the following message "It's a cold week", otherwise print the message "It's a warm week". Required in your answer: Write the shape number and the appropriate instruction No I Start 2 3 4 Yes Stop End of Category 3