PLEASE HELP ME WITH THIS QUESTION WITH EXPLANATION

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

Can someone me with this graph problem by the way i need to know the answers by today since this assignment is due ! !

When rolling 26 sided number cube what are the chances some of the role will be seven