Someone help plz and plz make sure it’s right :)

Abag of popcorn contains 483 calories and servers 3.5 people. how many calories are in each serving.

The variable z is directly proportional to x, and inversely proportional to y. when x is 4 and y is 13, z has the value 1.2307692307692. what is the value of z when x= 9, and y= 20

Answers; a) 135 degree’s b) 30 degree’s c) 180 or 0 degree’s d) 90 degree’s