At time t = 0 minutes, a tank contains 48 gallons of water. For 0≤ t ≤ 4 minutes, water flows into the tank at a rate of E(t) = 12t sin(π/4t) gallons per minute, and water leaks out of the tank at a rate of L(t)=6t²/t+2 gallons per minute. How many gallons of water are in the tank at time t= 4 minutes?
(A) 13.251
(B) 82.749
(C) 87.482
(D) 135.482