Solve it on a paper please do the calculations thank you.

2.1 (a) During drinking water treatment, 17lb of chlorine are added daily to disinfect 5 million gallons of water. What is the aqueous concentration of chlorine in mg/L ? (b) The chlorine demand is the concentration of chlorine used during disinfection. The chlorine residual is the concentration of chlorine that remains after treatment so the water maintains its disinfecting power in the distribution system. If the chlorine residual is 0.20mg/L, what is the chlorine demand in mg/L