A bakery sells cakes and pies. The baker can make a total of at most 80 desserts each day. Each cake requires 1.5 cups of sugar, and each pie requires 1 cup of sugar. The baker has 90 cups of sugar available daily. Due to demand, the baker must make at least 20 cakes and at least 30 pies per day. If is the number of cakes made and is the number of pies made, which system of inequalities represents the bakery's daily constraints?