Activity 2: Consider the employee database of Figure 2.2. Give an expression in the relational algebra to express each of the following queries: Find the ID and name of each employee who does not work for "BigBank". Find the ID, name, and city of residence of each employee who works for "BigBank". Find the ID, name, street address, and city of residence of each employee who works for "BigBank" and earns more than $10000. cployee (persoane, streetclty) works (persoane, comme salary) company companie, chy) Figure 3.2: Employee datobose