In the figure, these three resistors are connected to a voltage source so that R_{2} = 5.75 Ω and R_{3} = 11.5 Ω are in parallel with one another and that combination is in series with R_{1} = 1.75 Ω.

(a) Calculate the power being dissipated by the third resistor P_{3}, in watts.

(b) Find the total power supplied by the source, in watts.