Can someone help me with these 5 problems 1) Find dy/dx. Y=5x^-5 dy/dx=? 2) Compute the difference quotient f(x+h)-f(x)/h for the function f(x)=-4x^2-x-4. Simplify your answer as much as possible. f(x+h)-f(x)/h=? 3)Find an equation for the tangent line to the graph of y=(x^3-16x)^12 at the point (-4,0). The equation of the tangent line is y=? (Simplify your answer.) 4) As x approaches 1, the value of 4x+7 approaches_____. As x approaches 1, the value of 4x+7 approaches? (Simplify your answer.) 5) find the given limit. lim (-x^2+5x-6) X>-4 (Simplify your answer.)