Given an Uber like app with the following features:

$$ Search nearby taxis using GPS

$$ Fare estimation and fair calculation

$$ Estimated time of taxi arrival

$$ Request a taxi

$$ Trip history details

$$ Setup profile and login $($user and driver$)$

$$ Create bills

$$ Credit card transaction

$$ Online chat

$$ Accept$/$Reject request

Conduct the following:

$1-$ WBS or PBS $($to include all activities from the list above$)$ The BS should include the level of activities$/$products encompassing the listed activities$/$ products, and the levels below.

$2-$ Estimation for: activity size, effort required, cost of activity, and identify the numbers and type of staff required for the selected activities.