Could you help me answer 4a, b, c and d. See the image below

2x - 20 = 32 20 - 3x = 8 6x - 8 = 16 -13 - 3x = -10

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 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)

Qrst is a parallelogram. determine the measure of ∠q pls