A firm with a production function given by $F(L,K)=L^{\frac{1}{2}}{K}^{\frac{1}{2}}$ has to fulfill an order of $Q=60.$ Wage rate and rental rate are $$40$ and $$10$ respectively. How many units of labor

and capital should the firm use in order to minimize their cost? $($Hint: $41$

$2=2)$