A small company produces two products, x and y. Product x requires 1 hour of labour and 6 tons of raw materials, whereas each unit of product y requires 2 hours of labour and 5 tons of raw material. The number of hours available each week is 40 and the available raw materials each week is 150 tons. If the contribution to profit is 2 per unit of product x and 3 per unit of y, determine the weekly production mix that will maximize profits.