Question

I have confused how to do this?​

Answer 1

Answer:

refer the attachment

Step-by-step explanation:

reservoirs

A reservoir is an artificial lake where water is stored. Most reservoirs are formed by constructing dams across rivers. A reservoir can also be formed from a natural lake whose outlet has been dammed to control the water level.

Answer 2

Answer:

It's easy take common and then try to solve

hope it's helpful