B2. (Float) The book and available balances for a firm's checking account for the last seven days is given here. What is the daily float? For the seven days, what are the average book balance average available balance, and average float? DAY MONDAY TUESDAY WEDNESDAY THURSDAY FRIDAY SATURDAY SUNDAY Book balance $20,000 25,000 30,000 40,000 15,000 25,000 30,000 Available balance $30,000 40,000 45,000 30,000 10,000 30,000 35,000