$46)$

a$.(2$ points$)$ The plantigale $($Planigale gilesi$)$ and the sugar glider $($Petaurus breviceps$)$ are marsupial mammals native to Australia. The common shrew $($Sorex araneus$)$ and the Northern flying squirrel $($Glaucomys sabrinus$)$ are eutherian mammals native to Europe and north america. Plantigales and shrews live in open areas and feed on small prey, mainly arthropods. Sugar gliders and flying squirrels live on trees and use skin flaps on their flanks to glide between trees.

Draw a phylogenetic tree representing the $4$ species: