2. The Victorian Minister of Resources specifies that a sum of $800 million be available for closure rehabilitation of a mine that your company operates in 30 years from now. What is the annual regular contribution that should be made into a rehabilitation bond at the end of each year? Assuming an interest rate of 6 % compounded yearly Assuming an interest rate of 6 % compounded quarterly. What is the difference per year compared with part a? a. b