pls i need help on these asap

3. A particle of mass m is constrained to move on the inside surface of a smooth cone of half- angle o. The particle is subject to a gravitational force. Determine a set of generalized coordinates and determine the constraints. Find the Lagrange's equations of motion. 4. The point of support of a simple pendulum of length b moves on a massless rim of radius a rotating with constant angular velocity w. Obtain the expression for the Cartesian components of the velocity and acceleration of the mass m. Obtain also the angular acceleration for the angle 0 shown in the figure below