The initial level is h0=32 feet below the surface.
The final level is
[tex]h_1=h_0+5-13=32+5-13=24[/tex]We can calculate the change in level as:
[tex]\Delta h=h_1-h_0=24-32=-8[/tex]The total change is 8 feet more deep (-8 in reference to the surface level)
