Given: F= {(0, 1), (2, 4), (4,6), (6,8)} and G = {(2,5), (4,7), (5,8), (6,9), (7,5)} (F-G)(6) =
a. -3
b. 1
c. 3

the highest percentage for deaths in construction from highest to lowest is as follows: falls, struck by objects, electrocution, and caught-in/between. these four are collectively known as fatal four.

in the case of falls, the type that is responsible for the overall highest death in the category is falls from roofs.