The area of a trapezoid with bases a & b with height h is given by $\displaystyle {A}=\frac{{1}}{{2}}{h}{\left({a}+{b}\right)}$.

If a carpenter needs to sheet rock a wall designed as a trapezoid with bases of $\displaystyle \frac{{2}}{{3}}$ yards and $\displaystyle \frac{{11}}{{12}}$ yards with a height of $\displaystyle \frac{{1}}{{3}}$ yards, what is the area of the wall?

Enter number only.