I need help solving the following question about electric charge over a circular surface

3. Find the electric field at a distance z above the center of a circular disk. The disk is made of two concentric circular parts. The inner part is positively charged (shown in yellow), and the outer part is negatively charged (shown in blue). The surface charge density is of for the inner part, and -02 (02 > 0) for the outer part. The radius of the inner part is r, and the radius of the whole disk is r2. Requirements: a) Identify the symmetry in this system. Then identify the component(s) of the electric field that is(are) canceled out at a point P. b) Show all derivation steps (except when solving an integration using an integral table). c) Express the electric field at a distance z above the center of the disk using 01, 02, Z, 11, 12, and other universal constants. d) If of = 02 and 12 = 21, check if your result makes sense at z - 00. Z