For case 2, an expression for the deflection at C caused by the concentrated load must be determined.

In general, a standard beam table solution for the deflection at the tip of a cantilever beam due to a concentrated load applied at L/2 may not be available.
However, most beam tables will include a solution for the slope and deflection at the tip of a cantilever beam for a concentrated load applied at the tip. This information can be used to find the deflection at C for the loading shown.