An NPN transistor in common-emitter mode is used as a simple voltage amplifier with a collector current of 4 mA. The positive terminal of an 8 V battery is connected to the collector through a load resistance RL and to the base through a resistance RB. The collector-emitter voltage is VCE=4 V, the base-emitter voltage is VBE=0.6 V, and the current amplification factor is β=100. Calculate RL and RB.