Please answer! this is due in 2 mins! If the average student carries about 10 kg of books in his or her backpack, which of the three prototypes best meets the needs of students? Explain your answer.

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.