please answer question fully with neat handwriting in order for me to upvote, thanks

1. You just realized that you are disposing 800 L/year of water to the city sewer that has 0.5 wt% gold particles. A design engineer tells you that you can separate out all the gold particles with a high- speed centrifuge with 0.3 m diameter. If you purchase a centrifuge to separate the gold and sell it, the centrifuge will last 7 years. Alternatively, someone offers a 12-year contract to pay you $100/L for the untreated water. If you assume a prevailing interest rate of 4%, compounded annually, which option should you choose? You may assume that you incur no costs to operate the centrifuge. 1. You just realized that you are disposing 800 L/year of water to the city sewer that has 0.5 wt% gold particles. A design engineer tells you that you can separate out all the gold particles with a high- speed centrifuge with 0.3 m diameter. If you purchase a centrifuge to separate the gold and sell it, the centrifuge will last 7 years. Alternatively, someone offers a 12-year contract to pay you $100/L for the untreated water. If you assume a prevailing interest rate of 4%, compounded annually, which option should you choose? You may assume that you incur no costs to operate the centrifuge