Given X = \2,3,4,5 Y = \4,5,6,7,8 Z = \7,8,9,10\. Calculate X|Y (set difference X ext \ Y).

Here are the solutions to the first four questions.

1a. Given $X = \{2,3,4,5\}$, $Y = \{4,5,6,7,8\}$, $Z = \{7,8,9,10\}$.
The notation $A|B$ represents the set difference $A \setminus B$, which means the elements in set $A$ that are not in set $B$.

• i) $X|Y$

  Step 1: Identify elements in $X$ that are not in $Y$.
  $X = \{2,3,4,5\}$
  $Y = \{4,5,6,7,8\}$
  The elements 4 and $5