(1 point) a tank contains 2780 l of pure water. solution that contains 0.05 kg of sugar per liter enters the tank at the rate 3 l/min, and is thoroughly mixed into it. the new solution drains out of the tank at the same rate. (a) how much sugar is in the tank at the begining? y(0) = 0 (kg) (b) find the amount of sugar after t minutes y(t) = (kg) (c) ast becomes large, what value is y(t) approaching ? in other words, calculate the following limit. lim y(t) = (kg)