Code a program to execute multiple tasks concurrently and with some elements of thread control using the available methods (for example the use of sleep() and wait() methods).

Demonstrate the use of sleep() method to control the execution duration of each thread. Provide a different duration for each of the thread to show the effect to the output.

Provide user control to stop the thread using the appropriate approach in stopping the thread.

Briefly discuss the function of the sleep() method and its difference(s) with the wait() method.

Instructions for your tutor:

The question has to do with coding and any popular language can be used according to the question requirements.