(b) An electric vehicle (EV) using capacitive coupler to transfer power wirelessly as in Figure Q3(b). There are two plates are used for shield plate and four plates as coupler plates in which the dielectric between the plate is air. The plates are fabricated using copper and arranged without additional material. The dimension of the capacitive coupler is stated as in Table 3(b). [C4, SP3] coupler plate coupler plate O Wireless charger Wireless charging K shield plate shield plate coupler plate coupler plate Capacitive coupler structure Figure Q3(b): Electric vehicle charging system using capacitive coupler wireless power (1) (ii) No. 1 2 3 4 Table 3(b): Coupler dimension. Dimension (cm) Item Distance between shield to coupler 15 plate, a Distance between coupler to coupler 10 plate, b Coupler's size Shield coupler's size 40 (width) x 40 (length) 40 (width) x 100 (length) Design an equivalent circuit from K to L by showing the capacitance of the coupler to coupler plate and coupler to shield plate? [C5, SP4] [6 marks] Design a circuit in which it represented by a capacitor and determine the total capacitance from K to L? [C2, SP1] [5 marks]