Two friends, Penelope (23.0 kg) and Zora (25.0kg), are throwing snowballs at each other on a snowy day. Zora stands on a patch of icy, frozen ground where friction is negligible. Penelope stands on a section of ground that is not slippery at all. (a) Penelope throws a snowball with a mass of 910g and a speed of 12.0m/s at Zora, who then catches it. What is Zora's speed after catching the snowball? (b) How fast should Penelope have thrown the snowball to have given Zora a speed of 85 cm/s? (c) Suppose that Zora, initially at rest, throws a snowball (same mass and speed as de scribed in part a) back at Penelope. What is Zora's speed after throwing the snowball? (d) Why is Zora's speed in part (a) not equal to Zora's speed in part (e)? Explain using physics concepts, rather than by looking at the mathematical equations you've been using.