counter down timer with buttons

Using Arduino Project Guidance
#1

i want counter down timer of 10min and 59 sec which will be running on a seven segment led with two button for (stop/resume) also one for reset it will count down until it reaches 00:00 when it reaches zero it has to gives a buzzer sound for just three second

#2

So what's your plan for getting there? Any particular hardware setup in mind?

#3