So is there a high broiler under the grill or are all three broilers at floor level? And if the middle broiler is at the floor, too, what is in the cavity above it behind door number 2? Thanks.

I think my mother broiled foods when she had the electric range that came with the house in Illinois before  gas was put in and they got the gas stove and the gas water heater. All I remember of the broiler in the gas stove was mom broiling something and opening the oven door  and orange flames were jumping up along the sides of the oven and she never used the broiler after that. We started broiling again once we got the electric range in Georgia about 10 years later.