finite math course on simplex method. i need to know exactly how to get the answers.

2. The Simplex method has produced the matrix below and an optimal solution has been found. Examine the matrix and then answer questions a - e. 2 P X1 X2 X3 0 2 1 1 3 0 S1 -1 14 4 03 -2 09 0 5 0 2 2.5 1 145 a) Identify the basic variables. b) What is the value of xi? c) What is the value of x2? d) What is the value of x3? e) What is the value of P