Abody moves on a coordinate line such that it has a position sequalsf(t)equalsstartfraction 25 over t squared endfraction minusstartfraction 5 over t endfraction on the interval 1less than or equalstless than or equals5, with s in meters and t in seconds. a. find the body's displacement and average velocity for the given time interval. b. find the body's speed and acceleration at the endpoints of the interval. c. when, if ever, during the interval does the body change direction?