A social services agency tasked us with categorising cities based on population size for resource allocation purposes.

They'd like to categorise the cities according to the following population thresholds:

Populations less than $1,000,000$ are considered Small.

Populations greater than $1,000,000$ and less than $5,000,000$ are considered Medium.

Otherwise, the population is classified as Large.

What is the population category for Kinshasa?