Pls solve all

MIDTERM EXAM (BUS) 1. 3) Which are inequalities to have an increased and concave function at a point x = a ? b) Write two economic functions of two variables and their marginal's. c) Explain with your own words the notations A(TR) = MR-AQ A(TC) = MC-AQ d) Describe with your own words the procedure for nding the optimum solution (constraint optimization, substitution method) of the economic functions of two variables. e) Explain with your words what is the economic meaning of the Lagrangian multiplier \"A"? The answer sends as a word document