h(x) = g(f(x))

Assume that the tangent line to f(x) through the point (1,3) is y=3+5(x-1) and the equation of the tangent line to the graph h(x) through (1,4) is given by y=a-2(x-1). Find the equation of the tangent line to the graph of g(x) through the point (3,4)