Final answer:
To solve the simplex, change the coefficients in the objective function and find the new solution using the simplex method.
Step-by-step explanation:
To solve the simplex, we need to change the coefficients in the objective function and find the new solution.
If the coefficient of x1 changes to 40 and x2 changes to 60:
The new objective function becomes 40x1 + 60x2. Solve the simplex using this new objective function to find the new solution.
If only x1 changes to 40 and x2 changes to 90:
The new objective function becomes 40x1 + 90x2. Solve the simplex using this new objective function to find the new solution.