Decision Tree The Yoran Yacht Company $($YYC$),$ a prominent sailboat builder in Newport, may design a new $30-$foot sailboat based on the "winged" keels first introduced on the $12-$meter yachts that raced for the America's Cup. First, YYC would have to invest $18,000$ at t $=0$ for the design and model tank testing of the new boat. YYC$\text{'}$s managers believe there is a $60$