before-tax present values

1. Assume a 20% corporate income tax. Does a project that returns 16% before-tax have a negative NPV if it costs $100 today and if the appropriate after-tax cost of capital is 11%?
2. A firm will have before-tax cash flows of $3 million. It can invest in equally risky cash flows that earn a before-tax expected rate of return of 14%. What assumption do you have to make to allow yourself to work with before-tax present values?