L05 Havel signed a listing agreement with a real estate agent. The commission rate is 4% on the first $200,000 of the selling price, and 2.5% on the remainder. a. What commission will Havel pay if he sells his home for $289,000 ? b. What is the average commission rate on the selling price? 06 One year ago Helga allocated the funds in her portfolio among five securities in the mounts listed in the following table. The rate of return on each security for the year is iven in the third column of the table