A circle rolls once, without slipping, along the outside of a square with sides of length 4 inches, and returns to its starting point at A. The radius of the circle is 1 inch. To the nearest hundredth of an inch. how far does the center of the circle travel? (Use 3.14 for pi) PLS PLS HELP. And show work and explain!

It is saturday morning and jeremy has discovered he has a leak coming from the water heater in his attic. since plumbers charge extra to come out on the weekends, jeremy is planning to use buckets to catch the dripping water. he places a bucket under the drip and steps outside to walk the dog. in half an hour the bucket is 1/5 of the way full. what is the rate at which the water is leaking per hour?