How to answer this question? What is the answers to a, b and c? Presently, I am working on this question.

Edited 11 hours ago11 hr by Dhamnekar Win,odd
Spelling mistake corrected.

I suppose this can be cast as a linear programming model, though I am used to a more direct physical solution as the parallel operation of dissimilar power sources is an important real world situation

Is this homework/coursework ?

Assuming this is homework, a hint for (a)

Any linear programming problem requires the introduction of a constraint equation to bound the region where the constituent equations hold as there are not enough constituent equations by themselves (more unknowns than equations).