Please help fast. Sets and Venn Diagrams:

Consider the following sets.
U = {all triangles}

E = {x|x E U and x is equilateral}
I = {x|x E U and x is isosceles}
S = {x|x E U and x is scalene}
A = {x|x E U and x is acute}
O = {x|x E U and x is obtuse}
R = {x|x E U and x is right}
Which is a subset of I? lI
Please explain why simply.

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.)