Problem $3$:

From #$2,$ assuming there is an increase $($either population or flow$)$

of the following,

a$.$ What is the expected wastewater flow $($excluding

infiltration$/$Inflow$)$ after $20$ years?

b$.$ What is the expected wastewater flow $($including

infiltration$/$Inflow$)$ after $20$ years? Assume $\frac{\text{I}}{\text{I}}$ is $150\%$ of

wastewater flow.