1. (3 points) Let p, q, r, s denote the following

p: I complete my math homework before evening.

q: I will go for a walk at night.

r: The moon is visible.

s: The temperature is mild.

Write the following in symbolic form:

(a) If the moon is visible, I will go for a walk tonight.

(b) Completing my math homework before evening is necessary for me to go for a walk at night.

(c) A mild temperature and a visible moon are sufficient for me to go for a walk tonight.