2. For the ordered pairs in each one of these relations, the first element of each ordered pair will come from the set A and the second element of each ordered pair will come from the set B.
( i ) The relation r will contain all ordered pairs (as above) in which the first element is greater than or equal to the second element.
( ii ) The relation r will contain all ordered pairs (as above) in which the first element is equal to the second element.
( iii ) The relation r will contain all ordered pairs (as above) for which the first element minus the second element gives an even number.
( iv ) The relation r will contain all ordered pairs (as above) for which the sum of the two elements gives seven.