In the quark model of fundamental particles, a proton is composed of three quarks: two "up" quarks, each having charge + 2e/3, and one "down" quark, having charge – e/3. Suppose that the three quarks are equidistant from one another. Take that separation distance to be 1.32 x 1015 m and calculate the electric potential energy of the system of

(a) Only the two up quarks and

(b) All three quarks.