anyone can help me with this question?

I was wondering if you could please give me a quick idea of how you would treat two different cases on a linear accelerator in terms of technique used (four field or parallel opposed) and selection of beam energy (including why you would chose that energy). The two cases include: 1. A female patient with primary tumor centrally located within pelvis; 2. A male patient with metastatic lesion located in the lower femur.