Before your soccer game, you filled a water cooler with 6 1/2 gallons of water. You forgot to close the plug before you began filling the cooler with water and 2 5/6 gallons leaked out. How much water was in the cooler after you closed the plug?
a) 3 5/6 gallons
b) 4 1/3 gallons
c) 5 1/12 gallons
d) 3 7/8 gallons