Find all customers who have both a loan and an account at the SFU branch. Find customers who have an account, but not a loan at the SFU branch. Find all customers who have an account at all branches located in Brooklyn. For this example we will use implication, denoted by a pointing finger in the text, but by here. The formula means implies , or, if is true, then must be true.
Division is difficult to understand.
Think it through carefully.