Suppose the line tangent to the graph of f at x = 4 is y = 3x + 5 and suppose y= 5x 3 is the line tangent to the graph of g at x = 4. Find the line tangent to the following curves at x = 4. a- y = f(X)9(X) b.y= The equation of the line tangent to the curve y = f(x)g(x) at x = 4 is y = I]