De morgan's laws say (1) that the negation of an 'and' statement is logically equivalent to the statement in which each component is and (2) that the negation of an 'or' statement is logically equivalent to the statement in which each component is

negation of an 'and' is or

negation of an 'or' is and

Step-by-step explanation:

De Morgan's laws say that the:

"negation (A y B)" is logically equivalent to the statement "(not A) o (not B)"

"negation (A o B)" is logically equivalent to the statement "(not A) y (not B)"

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.