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4) (15 pts.) You open a retirement account that will pay 4% and you plan to deposit 8% of your annual salary in the account for 35 years. If your first year salary is $75,000 and you expect it to grow 6% every year, how much will you have in the account at the end of the 35t year? (20 pts.) A firm paid $500,000 for a manufacturing facility. It will produce 45 tons of packing material for each of the first 3 years that will be sold for $4,000 /ton. For the next 5 years, it will produce 60 tons of material that will be sold for $5,000/ ton. If i=15% and the annual operating costs were $100,000, did the firm make a good investment