A particle's velocity is described by the function v 122 =t2 7t+ 11 m/s, wheret is in s. V Part B At what times does the particle reach its turning points? Express your answers in seconds to two significant figures. Enter your answers separated by a comma. .Am-ao? 151,152: S m Muest Answer V PartC What is the particle's acceleration at each of the turning points? Express your answers in meters per second squared to two significant figures. Enter your answers separa by a comma. II-wol help ah '12 = m/s Amir starts riding his bike up a 200-m-long slope at a speed of 18 km/h, decelerating at 0.20 m/s as he goes up. At the same instant, Becky starts down from the top at a speed of 6.0 km/h, accelerating at 0.40 m/s as she goes down. Part A How far has Amir ridden when they pass? Express your answer with the appropriate units. HA ? C = 59 mNicole throws a ball straight up. Chad watches the ball from a window 5.20 m above the point where _ _ Nicole released it. The ball passes Chad on the How fast d'd N'COIe throw the ball? way Up, and it has a speed of 15.0 131/8 as it Express your answer with the appropriate units. passes him on the way back down. g \"A a a o :2 Value Units