When the weather turns warm, Bill plants wildflower seeds in planters at the front and back of his house. The front planter's bed is square with side lengths of 4 feet. The back planter's bed is rectangular with side lengths of 6 feet and 5 feet. Each packet of wildflower seeds covers 8 square feet. How many packets of wildflower seeds does Bill need to cover both planters? Write your answer as a whole number, proper fraction, or mixed number.
