The time is takes a spinner to stop completely is 12 seconds. if the spinner completes 6 revolutions in this time, what was the average angular velocity of the spinner, in radians per second, for the 12 seconds interval

Renee hiked for 6 3 /4 miles. after resting, renee hiked back along the same route for 5 1 /4 miles. how many more miles does renee need to hike to return to the place where she started? represent your answer as a simplified mixed number, if necessary.