Evaluate formulas

The formula for the area of a trapezoid is \(A = \frac12 h(a + b)\), where A is the area, h is the height, and a and b are the lengths of its bases.  Find A when \(h = 1\frac23\)in., \(a =2\frac12\) in., and \(b = 5\frac12\) in.

The formula for the area of a triangle is \(A = \frac12 bh\).  Find the area of a triangle whose base is \(12\frac12\) meters long and whose height is \(15\frac13\) meters.