For the following LP, show that the optimal solution is degenerate and that none of the alternative

Question:

For the following LP, show that the optimal solution is degenerate and that none of the alternative solutions are corner points (you may use TORA for convenience).
Maximize z = 3x1 + x2
Subject to
X1 + 2x2 ≤ 5
X1 + x2 - x3 ≤ 2
7x1 + 3x2 - 5x3 ≤ 20
X1, x2, x3 ≥ 0