The management of an oil company estimates that oil will be pumped from a producing field at a rate given by R(t) = 56/sqrt{t + 7} for 0 t 20, where R(t) is the rate of production in thousands of barrels per year, t years after pumping begins. How many barrels of oil, Q(t), will be produced the first five years? (Round answer to the nearest thousand barrels.)