Please write a report answering all 5 questions. The parameters in part 2 is cos

Please write a report answering all 5 questions.
The parameters in part 2 is cost function which consist of power x pi ( pi stands for the price of each KW )
We wish here to minimize cost and maximize revenue ( You need to initiate a function for both cost and revenue)
In part 3 u need to develop it through excel
That is all information i know about this.