Jonas is planning to use part of the land behind his house to have a soccer field. Jonas plots his soccer field plan on a grid. A side of each square on the grid is equal to two meters. Two of the vertices of the soccer field are at (4, 8) and (10, 4). If the soccer field is a rectangle, what are the coordinates of the other two vertices? Jonas is planning to build a fence around the soccer field. How many meters of fencing does Jonas need to put around the soccer field? How much of the land behind his house is located inside the fence?