average velocity over [4, 4.0001]: m/s average velocity over [4, 4.001]: m/s average velocity over [4, 4.01]: m/s instantaneous velocity at t = 4: m/sA rock dropped from a state of rest at time t = 0 on the planet Ginormon travels a distance of 50') = 15.2t2 m in 1' seconds. Estimate the instantaneous velocity at t = 4. (Use decimal notation. Give your answers to three decimal places.)