You are given the following partial information concerning investors' expectation for Years $15$ and Year $8$:

$\backslash$table$[[$Year$,r^{***},$Avg. $r^{***},$I,Avg. IP$,$rs$,$Is$],[1,2\mathrm{.}00\%,,4\mathrm{.}00\%,,,],[2,2\mathrm{.}00\%,,5\mathrm{.}20\%,,,],[3,2\mathrm{.}00\%,,5\mathrm{.}80\%,,,],[4,2\mathrm{.}00\%,,5\mathrm{.}80\%,,,],[5,2\mathrm{.}00\%,,,5\mathrm{.}40\%,,],[-,--,-,--,--,-,-],[8,2\mathrm{.}00\%,,,,7\mathrm{.}40\%,6\mathrm{.}00\%$