An object thrown at 173173 vertical feet per second from a height of 9494 ft has a height modeled by, h(t)=16t2+173t+94h(t)=-16t2+173t+94 Where h(t)h(t) is the height of the object (in feet) tt seconds after it was thrown. a) Find the average velocity of the object between 6.999 seconds and 7 seconds.

b) Find the average velocity of the object between 7 seconds and 7.001 seconds.

c) Using the above average velocities around 7 seconds, estimate the instantaneous velocity at 7 seconds.