i think is front la. you can choose to ignore it or get your rotor skim + check your brake pad. For the back it's using drum brake. The famous problem we have is... Bearing koyak lor. How to know? Drive above 60km/h got wung wung sound. Make sure your brake shoe install properly if you get it new. Cause if the mechanic install too ketat your bearing is going to koyak again.

best is to take out tayar and see else go see the celah celah still got metal or not. how to check rotor? Put your hand at the disk then rub on it. If it's not smooth then you need skimming if it's smooth don't bother about it.