Mr. shepherd is building a rock wall. he estimates he will need 7 3/4 tons of rock to complete the wall. his pickup truck can carry at most 3/4 ton of rock in each load. mr. shepherd loads his pickup truck with 3/4 ton of rock for each load except for the last one. how many full loads of rock will mr. shephard take with his pickup truck, and what fraction of a load of rock will he need to take on the last load?