Driverboard. Boss audio amp

Anyone know the value of these 2 resistors that are missing ?
 

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Do you happen to know the value of R84? I noticed it was burnt also

1 other question also do you know what transistors commonly fail on this board ?

There are 4 outputs in this amp 2 of the outputs get hot fast the outputs that are heating up are the outputs with their 3rd leg connected to the inductor .