This is an example problem for approximate analysis of a statically indeterminate frame with gravity loads. The approximation is based on estimating the inflection points in the girders of the frame.
Part 1: Estimating the location of inflection points, detailed analysis of a girder. Drawing approximate shear and moment diagrams of the girder.
Part 2: Quick analysis of girder and shear and moment diagram. Determining the support reactions of the frame, approximately.