If f: N N is defined by f(x) = x + 2 and g: N N is defined by g(x) = 3x.Calculate the following:

a.(f g)(10) = __________

b.(g f)(10) = __________

c.(f g)(x) = ___________

d.(g f)(x)= ___________

e.(f f)(x) = ___________

f.(g g)(x) = ___________

g.f^-1(x) = ______________

h.g^-1(x)= _____________