PLEASE PLEASEE HELP IM DESPERATE!! Which equations represent a proportional relationship? If it is a proportional relationship, give the constant of proportionality.

1) m = 7.2n

2) 8b = a

3) f = 9/5c + 32

4) y = x/5

Exclude leap years from the following calculations. (a) compute the probability that a randomly selected person does not have a birthday on october 4. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability that a randomly selected person does not have a birthday on the 1st day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability that a randomly selected person does not have a birthday on the 30th day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (d) compute the probability that a randomly selected person was not born in january. (type an integer or a decimal rounded to three decimal places as needed.)