For a National Junior Honor Society Induction Celebration, Alhadi is renting tables and chairs. He wants to have only tables for 4 and tables for 6. The total number of people that can be seated in the school cafeteria with these tables is 120. (a) Describe some possible combinations (at least 2) of 4-seat tables and 6-seat tables that will seat 120 guests. (b) Write an equation to represent the situation. Check all the true statements. (Let x be the number of 4 chair tables, and y be the number of 6 chair tables)