[2.47] You are given the following polyhedral set. Identify the faces, extreme points, extreme directions, and extreme rays of the set. x1 x2 + 2x1 x2 X3 ≤ 10 + 2x3 ≤ 40 3x1 - 2x2 + 3x3 50 x1, x2, x32 0.