If a ball is thrown into the air with a velocity of 48 ths, its height in feet t seconds later is given by y = 43: 15t2. {a} Find the average velocity for the time period beginning when t = 2 and lasting for each of the Following. {i} 0.5 seconds Em {ii} 0.1 seconds Em {iii} 0.05 seconds Ems {iv} 0.01 seconds Em {b} Estimate the instantaneous velocity when t = 2. Sam