need help with these questions please.

Farmer Green grows cannabis. If Farmer Green plants no seeds, there is no harvest. If Farmer Green plants 1 bushel of seeds, he gets 100 pounds of cannabis. If Farmer Green plants 2 bushel of seeds, he gets 180 pounds of cannabis. If Farmer Green plants 3 bushel of seeds, he gets 235 pounds of cannabis. If a bushel of seeds costs $1,000 each and this is the only cost, the total-cost curve is O decreasing at a decreasing rate. increasing at an increasing rate. increasing at a constant rate. O increasing at a decreasing rate