Find the arc length and surface of revolution of the graph of the given function on the interval 3/2 y=x-1; [0,4]; Revolution surface around the y axis

Find an equation of the tangent line to the parabola y=3x2 at the point 1,3.

Write parametric equations for a cycloid traced by a point P on a circle of radius a as the circle rolls along the x -axis given that P is at a maximum when x=0.