J 4. Figure 4 shows a parallelplate capacitor of plate area A = 10.5 cm2 and plate separation 2d 2 7.12 mm. The left half of the gap is filled with material of dielectric constant K1 = 21.0; the top of the right half is filled with material of dielectric constant K2 = 42.0; the bottom of the right hahc is filled with material of dielectric constant 1C3 = 58.0. (a) What is the equivalent capacitance in terms of K1, K2, K3_ A, d? Fig. 4 (b) Calculate the capacitance