Answer:
A"B" = 8 ft
Explanation:
From the given question, ABCDE has undergone transformation to produce images A'B'C'D'E' and A"B"C"D"E". But its size and shape has been preserved.
ABCDE was initially reflected and rotated with respect to point E to have A'B'C'D'E', which was finally reflected across line p to produce A"B"C"D"E". This implies that the dimensions of ABCDE were not affected in the process.
So that, AB = A"B" = 8 ft.