Consider Variation 5 of the Wyndor Glass Co. model presented in Sec. 6.7, where c2 3, a22 3, a32 4, and where the other parameters are given in Table 6.21. Starting from the resulting final tableau given at the bottom of Table 6.24, construct a table like Table 6.26 to perform parametric linear programming analysis, where c1 3   and c2 3  2.

How far can  be increased above 0 before the current basic solution is no longer optimal?