Replace Values in Nested XML Using PowerShell

How do i replace the values of “Racers”, “Pacers” “Losers” from “false” to “True” using PowerShell ?

`

<Tester>
<TesterSection>
 <section name="TestingApp" type="Amazon,Google" />
</TesterSection>
<application>
 <add key="Minimum" value="1" />
 <add key="Maximum" value="true" />
 <add key="Runners" value="N/A" />
 <add key="Racers" value="false" />
 <add key="Pacers" value="false" />
 <add key="Losers" value="false" />
</application>  
</Tester>

tagerisand, welcome to Powershell.org. Please take a moment and read the very first post on top of the list of this forum: Read Me Before Posting! You’ll be Glad You Did!.

This forum is for scripting questions rather than script requests. We do not write customized and ready to use scripts or solutions on request.

We expect you to make an own attempt to get your task done or to solve your problem. If you have done so already please document here what exactly you have done and show your code. Then we probably might be able to help you step further.