I need help with this

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

Given ab and cb are tangents of p, and m =10°. what is the measure of abp?

If f(x) and g(x) are inverse functions of each other, which of the following shows the graph of f(g(x)