Find and trace the compound strokes in the characters.

a)

The character is '了'. The strokes are:
1. 竖弯钩 (shù wān gōu)
2. 撇 (piě)

b)

The character is '乙'. The strokes are:
1. 竖弯钩 (shù wān gōu)

c)

The character is '乙'. The strokes are:
1. 竖弯钩 (shù wān gōu)

d)

The character is 'し'. The strokes are:
1. 竖弯钩 (shù wān gōu)