Two $0\mathrm{.}75$ m cantilever beams from a wall support a shelf in the workshop, holding materials up to $100$kg$,$ evenly distributed between the supports and along the beams. Calculate the magnitude of shear force and the bending moment for one of the support beams, providing suitable scaled Shear Force and Bending Moment diagrams to support your calculations.

A $3\mathrm{.}3$m Encastre beam supporting a flat roof bears a normal load of $1k\frac{N}{m},$ which can increase to $1\mathrm{.}5k\frac{N}{m}$ with heavy snow. Calculate the magnitude of shear force and the bending moment under the increased load. Provide suitable scaled Shear Force and Bending Moment diagrams to support your calculations.