Prablem 7.13. You have $6000 with which to bud a rectangulaI enclosure with fencing. The fencing material costs $20 per meter. You also want to have two parititions across the width of the enclosure, so that there will be three separated spaces in the enclosure. The material for the partitions costs $15 per meter. What is the maximum area you can achieve for the enclosure? Problem 7.14. Steve likes to entertain friends at parties with \"wire tricks." Suppose he takes