The switchboard shown in this figure is 3 meters wide and 5 meters long and is placed on a concrete near a slab wall. A live part extends 0.15 meter from the back of the switchboard. A clearance of 0.75 meter between the live part and the wall is required. There is a front walk space 1 meter wide and two side walkways each 0.6 meter wide. What is the area of the slab in square meters?