Answer:  g(f(0)) = 2 and  (f ° g)(2) = -3.
Step-by-step explanation:  We are given the following two functions in the form of ordered pairs :
f = {(-2, 3), (-1, 1), (0, 0), (1,-1), (2,-3)}
g = {(-3, 1), (-1, -2), (0, 2), (2, 2), (3, 1)} .
We are to find g(f(0))  and   (f ° g)(2).
We know that, for any two functions p(x) and q(x), the composition of functions is defined as

From the given information, we note that
f(0) = 0,  g(0) = 2,  g(2) = 2  and  f(2) = -3.
So, we get

Thus,  g(f(0)) = 2 and  (f ° g)(2) = -3.