Your company has the following on$-$premises web app servers:

Server$1$ that is connected to a network segment that uses the address space $172\mathrm{.}16\mathrm{.}10\mathrm{.}0/24$ and hosts a web app named WebApp$1$

Server$2$ that is connected to network segment that uses the address space $172\mathrm{.}16\mathrm{.}10\mathrm{.}0/24$ and hosts two web apps named WebApp$2$ and WebApp$3$

Server$3$ that is connected to a network segment that uses the address space $172\mathrm{.}16\mathrm{.}50\mathrm{.}0/24$ and hosts three web apps named WebApp$4,$ WebApp$5$ and WebApp$6$

You need to publish all six web apps by using a Microsoft Entra Application Proxy.

What is the minimum number of connectors that you must install?