Niamh, an arborist, uses the compound$-$lever pruning shears in the figure to prune

dead$/$diseased ponderosa pine branches as part of their job. If the maximum vertical force

Niamh can apply is $P_{\text{m}\text{a}\text{x}}=200N,$ determine the largest diameter $($to the nearest whole $cm)$

branch they can prune using the given graph, where $F_E$ are the vertical forces applied by

the shears on the branch $E.$ Assume that the handle $BD$ is not contacting the blade $AC,$ and

that all connections are pins.