Brick$/$Stone Homework

The below figure shows a ${23}^{\text{'}}{0}^{\text{'}\text{'}}$ wide by ${19}^{\text{'}}0$ high modular brick wall. The opening shown is located is $6^{\text{'}}{0}^{\text{'}\text{'}}$ wide and $70^{\text{'}\text{'}}$ high. The lintel is $8^{\text{'}\text{'}}$ tall cast stone with $4^{\text{'}\text{'}}$ of bearing on each side of the opening. How many brick are supported by the lintel? $($round to whole brick$)$