Figure 1 gives the top view and the left side view of a cast bracket in first-angle projection (dimensions in mm). The bracket has a base, an upright at its right end, a 10 mm thick triangular rib on the centre plane and a Ø16 hole through the base. Draw the sectional front view on the cutting plane A–A, viewed in the direction of the arrows, in its correct position above the XY line.