Underestimating module two by a factor of two affects the team size by one and increases the effort of the project by $14$ person$-$months. However, the duration of the project was only affected by $\mathrm{.}5$ months, so not much different than the original duration.

To fully compensate for the changes made, there can be a change to the personnel attribute: Application experience. Changing this one factor gives us an ending project cost that is about $$7,000$ less than the original project cost we calculated in task one