An engineering company normally expects a rate of return of 11% on investments. Two projects are available but only one can be chosen. Project A requires an immediate investment of $7,200. In return, a revenue payment of $4,500 will be received in four years and a payment of $10,000 in seven years. Project B requires an investment of $1,800 now and another $3,000 in three years. In return, revenue payments will be received in the amount of $1,000 per year for seven years. Which project is preferable?