please help don't have much time will upvote answer! multiple choice question

You are responsible for evaluating the new investment project. The cost of the project is $ 500,000 and will have a lifespan of 5 years. Damping is linear up to a zero value. The unit variable costs are $ 10,000 and the fixed costs are $ 400,000. It is planned to sell 1000 units at $ 15,000 per unit. The minimum return payable is 10% and the tax rate is 34%. Based on your expertise, you assume that the projections for number of units sold, variable costs and fixed costs are probably correct within +/- 15%, what is the NPV in basic assumptions and at best and the worst case scenario?

a)VAN basic assumption:

$ 10,820,200.99

Worst case NPV:

$ 2,541,122.69

Van best scenario:

$ 22,257,467.84

b)VAN basic assumption:

$ 10,820,200.99

Worst case NPV:

$ 5,682,737.22

Van best scenario:

$ 16,194,684.87

c)None of the above.