A startup company will require capital investment of $350,000 in 2018 and another $340,000 in 2019. Revenue in 2018 is estimated to be $50,000 and $60,000 in 2019. After 2019, the revenue is expected to be $175,000 per year for a total of four years. After four years, the firm will be sold for $1,000,000. What is the simple payback period for this business venture? Draw a cash-flow diagram