A moving sidewalk 95m in length carries passengers at a speed of 0.53 m/s. One passenger has a  normal walking speed of 1.24 m/s.

 (a) If the passenger stands on the sidewalk without walking, how long does it take her to travel the length of the sidewalk? 

(b) If she walks at her normal walking speed  on the sidewalk, how long does it take to travel the full length? 

(c) When she reaches the end of the sidewalk, she suddenly realizes that she left a package at the opposite end. She walks rapidly  back along the sidewalk at double her normal walking speed to retrieve the package. How long does it  take her to reach the package?