HELP ASAP PLZ $12-18.$ Two mutually exclusive investment alternatives are being considered, and one of them must be selected.

Alternative A requires an initial investment of $$13,000$ in equipment. Annual operating and maintenance costs are anticipated to be normally distributed, with a mean of $$5,000$ and a standard deviation of $$500.$ The terminal salvage value at the end of the eight$-$year planning horizon is anticipated to be normally distributed, with a mean of $$2,000$ and a standard deviation of $$800.$

Alternative $B$ requires end$-$of$-$year annual expenditures over the eight$-$year planning horizon, with the annual expenditure being normally distributed with a mean of $$7,500$ and a standard deviation of $$750.$ Using a MARR of $15\%$ per year, what is the probability that Alternative $A$ is the most economic alternative $($i$.$e$.,$ the least costly$)?(12\mathrm{.}5)\backslash$table$[[$End of Year,Alternative A$,$Alternative $B$