Assume that you are solving the following LP model using Two-phase method. Please write the following model as a standard form (augmented form). You need to write the objective functions for phase 1 (Z1), phase 2 (Z2) and the constraints in the standard form including and artificial variable(s). Use "a" for the artificial variable names (for example, a1 and a2, etc.) and use "s" for a slack/surplus variable names (for example, si and s2, etc.). Don't forget to change "Min" to "Max" for both objective functions. Min x1 + x2 3.t. x1 2x2 >= 6 3xl + 3xl + 5x2