$[5$pts$]$ Interest is $10\%$ per year, compounded monthly. A payment is made of $-$$$20K$ at time $0.$ Revenues are earned starting at $$8K$ at year $1$ and decreasing by $$500$ each year through year $8.$ Find the present worth of these cash flows$[5$pts$]$ Interest is $10\%$ per year, compounded monthly. A payment is made of $-$$$20K$ at time $0.$ Revenues are earned starting at $$8K$ at year $1$ and decreasing by $$500$ each year through year $8.$ Find the present worth of these cash flows