Examine the following set of linear inequalities:
(1) x≥0, \; (2) y≥0, \; (3) x+y≤10, \; (4) 2x+2y≤20, \; (5) 3x+3y≤30, \; (6) x+y≥12.
(i) List all constraints that are redundant.
(ii) State whether the overall system is feasible or infeasible.
a. (i) List all redundant constraints.
b. (ii) State feasibility: "Feasible" or "Infeasible".