3. On a warm autumn day, you are in a forest throwing acorns high up into the air. Suppose that you throw two acorns straight upward. a. If you threw the second acorn three times faster than the first, and it took 10 s to return to the ground, how long did it take the slower one to return to the ground (neglect the effect of your height). b. If the slower one reached a maximum height of h, how high did the faster one go as a factor of h?