I'm having trouble w/ this question. Can somebody help?

I know the equation for part a) is \$P_{max} = \frac{1}{4} \cdot \frac{|Vth|^2}{R_L}\$. And I'm sure that I have to cut out the \$R_L\$ resistor from the circut and just focus on getting the thevenin equiv. for the transformer circuit.

Any ideas?