Can someone please help me :)

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)

Solve this problem! extra ! 3025/5.5 = a/90.75

Either enter an exact answer in terms of \piπ or use 3.143.14 for \piπ and enter your answer as a decimal.