Shown in the figure below is a hollow disk of charge. The disk carries a charge density ? and has an inner radius R1 and an outer radius R2. You are to calculate the magnitude of the field at the point P which is a distance z above the plane of the disk. Determine the area element, dA =        Determine the charge element, dQ =        Determine the distance, s =        Determine the so-called, cos(?) =        Determine the integrand, ∬        Determine the lower bound of the ? integral:        Determine the upper bound of the ? integral:        Determine the lower bound of the r integral:        Determine the upper bound of the r integral:        Determine the final result of the integration:        NOTE: Please use k in your answers. Please do not use ?0.

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