For Variation 6 of the Wyndor Glass Co. model presented in Sec. 7.2, use the last tableau

Question:

For Variation 6 of the Wyndor Glass Co. model presented in Sec. 7.2, use the last tableau in Table 7.9 to do the following.
(a) Find the allowable range for each bi.
(b) Find the allowable range for c1 and c2.
(c) Use a software package based on the simplex method to find these allowable ranges.