Machinery Management course - You have 400 acres of land to prepare for wheat seeding and must go over the tilled ground twice in 16 working days

Machinery Management course - You have 400 acres of land to prepare for wheat seeding and must go over the tilled ground twice in 16 working days with a tillage tool that has 300 pounds of soil resistance per foot. Assuming it needs to be pulled at 5 mph, what size tool and FWAD tractor would be needed? For each working day you can average 8 hours in the field, and field efficiency is 80%.