Laneka owns a cake shop. she is currently preparing cakes for two anniversary parties the first cake has 3 small tiers and 1 medium tier and will serve a total of 100 guests. the second one has 3 small tiers and 2 medium tiers and will serve a total of 140 guests. Part A: represent the situation with a systems of equations.

Part B: Solve the system of equations.

Part C: How many guests will a small tier and medium tier serve?