Show the analysis, specification, design, and implementation phases of the following problems Problem 1 (5 points) Find the area of a circle. The radius is 15. Problem 2 (5 points) Find the square root of the number 144, use pow function. Problem 3 (5 points) Find the factorial of the number 13. Factorial of 13 is 13 12 11 10*9*8*7*6.5*4.3 2.1 Problem 4 (5 points) Find the sum of the following five numbers 12,45,33,67,89 Question (5 points): Find the area of a rectangle. The width is 10 and the length is 12