A manufacturer has three machines A, B, and C. Machines A and B
can be operated for at most 12 hours whereas machine C must be
operated for at least 5 hours a day. These three machines produce
only two items X and Y. Product X requires 1 hour from machine A,
two hours from machine B and 1 hour from machine C. Product Y
requires 2 hours from machine A, one hour from machine B and 1.25
hours from...