branch(branch_name, branch_city, assets) customer (customer_name, customer_street, customer_city) loan (loan_number, branch_name, amount) borrower (customer_name, loan_number) account (account_number, branch_name, balance) depositor (customer_name, account_number) Figure 2.15 Banking database for Exercises 2.8, 2.9, and 2.13. 2.13 Consider the bank database of Figure 2.15. Give an expression in the relational algebra for each of the following queries: a. Find all loan numbers with a loan value greater than $10,000. b. Find the names of all depositors who have an account with a value greater than $6,000. c. Find the names of all depositors who have an account with a value greater than $6,000 at the "Uptown" branch