Circle a has a diameter of 8 inches, a circumference of 25.12 inches, and an area of 50.24 square inches. the diameter of circle b is 3 inches, the circumference is 9.42 inches, and the area is 7.065 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points) part c: what observation can you make about the value of pi for circles a and b? (2 points)