Bsop

Sir i have a question which says tge initial lanavia investment is only a relatively short term five year project .however the directors expect that if the project is successful it will allow marvin co to exploit on a follow on opportunity in lanavia by investing in a second factory.
Initial investigations in to this follow on project suggest that an investment of 2m in four years time would yield an overall after tax return of 0.3m each year in perpetuity from year 5 onwards..the standard deviation of the follow on project is 30% and risk free rate is 6% .the cost of capital is 10%….

Please explain how to calculate pa in the above scenario ?