A clock has a radius of 6.2 inches. The minute hand is 5.9 inches long, and the hour hand is 5.5 inches long.

a. How much longer is the circumference of the clock than the circumference of the path of the tip of the minute hand? Round to the nearest hundredth.

b. How much longer is the circumference of the path of the tip of the minute hand than the circumference of the path of the tip of the hour hand? Round to the nearest hundredth.