plz solve this question using solver excel

The K-D Company operates a copper mine in Arizona. The mine produces from four different pushbacks with the characteristic given as follows: Area Tones(K) %Cu %As Profit/tone Stripping ratio 1:1 3:1 300 0.6 0.019 1 2 2 3 400 1.0 0.02 500 0.7 2:1 4 3 4 0.032 0.025 400 1.3 3:1 2 5 300 1.1 0.006 4:1 3 A - The management like to produce at least Imillion tones averaging between 0.8% and 0.9%of Copper. Arsenic contents less blew 0.024%, and maintains a stripping ratio between 2:1 and 3:1. If the company like to develop a plane, which maximizes the profit, Find a three feasible solutions for this problem? (Write down the objective function and the constraints). B- what would be your intuitive solution to the above problem. C. Develop a solver model and compare results with your answers to B