An empty tank is filled from a cold water pipe for six minutes and then from a hot water pipe for four minutes. The volume, V liters, of water in the tank after t minutes is given by the function
(a) Find the volume of water in the tank at
(i) t = 0, (ii) t = 6, (iii) t = 10.
(b) Draw the graph of the function for 0 S t S 10.