Consider the utility function U(x,y)=3x+6y. An agent with a budget constraint of 15x+5y=30 will choose which of the following bundles in order to maximize his utility? 1/2 unit of x and 1 unit of y 2 units of x 2/3 units of x and 4 units of y 6 units of y 1 unit of x and 3 units of y