4. The acceleration due to gravity is -9.8 meters per second squared. An object is thrown upward from a 100-meter tower with a velocity of 49 meter per second. a. Find the velocity function.. b. Find the interval on which the stone is moving up. c. Find the interval on which the stone is speeding up. d. What is the average velocity of the stone from the time the stone is thrown upward to the time it hits the ground?

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