We fly workers from Calgary to the Diamonds Are For Eva diamond mine near Yellowknife, and we have a choice between buying a plane for $$120$ million, or leasing a plane for $$15$ million$/$year$.$ The PVCCATS is $$20$ million. If we buy the plane, we pay $$5$ million in annual maintenance costs for $30$ years. If we lease the plane, all maintenance is included. Assume no taxes, and no net impact on revenues or working capital.Using a $7\%$ discount rate, what is the present value of each option? a$)$ The PV of leasing the plane is equivalent to a cost of $$162$ million; the PV of purchasing the plane is equivalent to $$186$ million. b$)$ The PV of leasing the plane is equivalent to a cost of $$214$ million; the PV of purchasing the plane is equivalent to $$186$ million. c$)$ The PV of leasing the plane is equivalent to a cost of $$186$ million; the PV of purchasing the plane is equivalent to a cost of $$162$ million.d$)$ The PV of leasing the plane is equivalent to a cost of $$186$ million; the PV of purchasing the plane is equivalent to a cost of $$214$ million.