Sorry, got involved with my own kids.
19 radius 4 semicircle pi 4^2 / 2 + rectangle 3 (8) = 49.1
choice b
11.
5 (4) + (1/2) 1 (5) = 22 1/2
choice c
12
The figure shows choice b, congruent opposite angles, which is enough to prove it's a parallelogram
Choice b