The circuit shown in adjacent figure consists of an external resistance of $$10.0\,\Omega$$ connected across two batteries of emfs $$6.0\,\mathrm{V}$$ and $$9.0\,\mathrm{V}$$ with internal resistance of $$1.0\,\Omega$$ each. Find the power dissipated by the $$10.0\,\Omega$$ resistor.

A

$$6.5\,\mathrm{W}$$

B

$$5.1\,\mathrm{W}$$

C

$$3.5\,\mathrm{W}$$

D

$$5.5\,\mathrm{W}$$