For the example we're working on$,$shouldn$\text{'}$t I be finding D$3$through infinity instead of P$2?$There is no p$2$in the example. This is how I got to $42\mathrm{.}18$for D$3$through Infinity$---->3\mathrm{.}57/(\mathrm{.}10-\mathrm{.}03)/(1+\mathrm{.}10)^2.$This leads to an answer of $47\mathrm{.}86$not $46\mathrm{.}68$as previously stated. The feedback from Chegg AI is agreeing with my answer, so I need to find the discrepancy.