Solution:
Assumption: There is sufficient wall width to take the mirror.
If (2 3/4) *5 is more than the surface area of the mirror then it will fit.
Note that (2 3/4) → 11/4 so we have wall surface are → (11/4) *5 = 55/4
wall surface are:- 55/4 = (13 3/4)ft²
As the area of the mirror (11 11/16)ft² < (13 3/4)ft² area of the wall
Then the mirror fits.