1) Write Relational Algebra expressions AND the corresponding SQL for the following queries (100 points for the RA expressions, 100 points for the SQL queries): Relations: Customers(customer_id, name, address) Accounts(account_id, customer_id, branch_id, balance) Branches(branch_id, location, county, address, year_founded) Add 2% interest to accounts with a balance less than $8,000, and 1.5% interest to accounts with a balance of $10,000 or more Find all customers who have an account from at least the "Cobb" and the "Symrna" branches Return the name and address of all customers with account balances below $3,000 and that have the word 'Road' on their address. Provide all the customer_ids, names and branch locations for all the distinct accounts each customer might have 1) 2) 3) 4)