When using the Hydraulic$-$Elements Graph for the design of partially$-$full circular pipes $($Figure $1$ in the Exam $2$ Supplement$),$ unless told otherwise we will always:

Group of answer choices

use the lines for reading Q and V values independent of n and f$.$

use the lines for reading Q and V values where n and f are constant.

use the lines for reading Q and V values where n and f vary with depth.

None of the listed options are correct