Ursula mixed 3 1_ 8 cups of dry ingredients with 1 2_ 5 cups of liquid ingredients. For numbers 1a–1c, estimate the amount of ingredients Ursula used. Choose the correct benchmarks and sum. 1a. Ursula used about 2 3 3 1_ 2 4 cups of dry ingredients. 1b. Ursula used about 1 1 1_ 2 1 3_ 4 2 cup(s) of liquid ingredients. 1c. Ursula used about 3 3 1_ 2 4 4 1_ 2 cups of ingredients.