2 sound for one object on press of diffrent buttons.

hello everyone ,

my querry is as follows: i have an object and i have inserted two audio clips to it .game object is a TANK . on press of key "W" tank audio should play . on click of spacebar it fires so i want to play the firing sound on click of spacebar. i have tried like this:

 var tank: AudioClip;
 var fire: AudioClip;
  
 function Update() {
  
 if (Input.GetKey(KeyCode.W))
 {
 audio.PlayOneShot(tank);
 }
  else if (Input.GetKey(KeyCode.Space))
 {
 audio.PlayOneShot(fire);
 }
 else
 {
   audio.Stop();
 }
 }

@script RequireComponent(AudioSource)

only problem i am getting here is that fire sound does not play along with tank sound.i want to play firing sound simultaneously while tank sound gets played.

NOTE : i am using audio.Stop(); jus to stop the tank sound instantly .. else the tank audio keeps on playing unless the audio is complete . i am using only 1 audiosource . i hope dats not a boring question. this is my first question to unity n its members. THANX :)