I need help with this question please.

The random variable X is given by the sum of the scores when two ordinary dice are thrown.

i) i need to use the shape of the distribution to find E(X)=U

( but i dont know what i need to draw for that...)

From this i should also be able to valculate Var(X)=0^2

Finally i need to find P(X<U) and P(X>U+o) < could someone please tell what these mean and how to calculate .

Thank you