A point charge of \( 10^{-8} \, \text{C} \) is placed at origin. The work done in moving a point charge \( 2 \, \mu \text{C} \) from point \( A(4, 4, 2) \, \text{m} \) to \( B(2, 2, 1) \, \text{m} \) is ______________ \( \text{J} \). \( \left( \frac{1}{4 \pi \varepsilon_{0}} = 9 \times 10^{9} \text{ in SI units} \right) \)
