Capacitor

Two parallel plates with dielectric placed between the plates are as shown in figure. The resultant capacity of capacitor will be [A = area of plate. \(t_1, t_2\) and \(t_3\) are thickness of dielectric slabs, \(\mathrm{k}_1, \mathrm{k}_2\) and \(\mathrm{k}_3\) are dielectric constants.