Please solve this question in details and explaination. Thanks so much in advance.

The figure shows a parallel-plate capacitor of plate area A = 11.2 cm2, and plate separation 2d = 6.61 mm. The left half of the gap is filled with material of dielectric constant k1 = 23.5; the top of the right half is filled with material of dielectric constant k2 = 45.3; the bottom of the right half is filled with material of dielectric constant k3 = 55.0. What is the capacitance