Please do number 13,14,15

13) How many lbs. of copper which costs $5/ibs. must be added to 3 lbs. of tin which costs $9/lbs. to make bronze which costs $6/lbs.? 15) How many 02. of peanuts which cost 31/02. must be added to 1 oz. of spices which cost 34/02. to make Trevon's Red Hot Peanuts which cost $2/oz.? 14) How many kg of sliced peaches which cost $2/kg must be added to 8 kg of sliced bananas which cost $9/kg to make fruit salad which costs $6/kg? 16) How many kg of soybean oil which costs $4(g must be added to 12 kg of canola oil which costs $2/kg to make vegetable oil which costs $3/kg