6.4 Using the simulation developed in Problem 6.3, develop a plot that shows the operating point (head [ft] and capacity [gpm]) as a function of the rotational speed of the 6½ in. impeller over the range 1500 ≤ rpm ≤ 2500 in 50-rpm increments.

Plot the pump head as a function of capacity using a symbol to indicate the impeller speed.