Your firm is considering leasing a new computer. The lease lasts for $4$ years. The lease calls for $5$ payments of $$450$ per year with the first payment occurring immediately. The computer would cost $$5,900$ to buy and would be depreciated using the straight$-$line method to zero salvage over $4$ years. The firm can borrow at a rate of $7\%.$ The corporate tax rate is $21\%.$ What is the NPV of the lease?