or Write a system of equations to describe the situation below, solve using any method, and fill in the blanks. Olivia owns a cake shop and she is working on two wedding cakes this week. The first cake consists of 3 small tiers and 2 large tiers, which will serve a total of 144 guests. The second one includes 3 small tiers and 1 large tier, which is enough servings for 102 guests. How many guests does each size of tier serve?