Problem $6\mathrm{.}9$ In $2016,$ Google rented $1000$ acres of a historic California airbase in the San Francisco Bay Area for $$1\mathrm{.}16$ billion via a $60-$year lease. Annual M&O is expected to be $$6\mathrm{.}3$ million. In addition, Google will refurbish three hangars at a cost of $$2\mathrm{.}6$ million $4$ years from now. Assuming the $$1\mathrm{.}16$ billion represents the present worth of only the lease, what is the equivalent AW of the transaction over the $60-$year period at an interest rate of $15\%$ per year?

$****$draw the cash flow diagram to used in my report$****$