please solve with excel gragh

1) Use the graphical method to solve the problem: Maximize Z=10x1+20x2 subject to x1+2x215x1+x2125x1+3x245 and x10,x20. a) Plot a graph and show the feasible region (manually solve). b) Use solver and find an optimal solution. 2) The following table summarizes the key facts about two products, A and B, and the resources, Q,R, and S, required to produce them. (a) Formulate a linear programming model for this problem. (b) Plot the graph manually and show feasible region. C) Solve this model using excel solver