Consider the following, third, linear program (LP): MinZ=3x-4y subject to 2x+y≥8 6x+y≥12 2x+3y≥12 x,y≥0. Which of the following are true? 1) The objective function is to minimize Z 2) The objective function is to maximize Z 3) The constraints are all inequalities 4) The constraints are all equalities