Answer:
Part a)
E = 0
Part b)

Part c)
Electric field inside the conductor is again zero

Part d)

Step-by-step explanation:
Part a)
conducting sphere is of radius
R = 2 cm
so electric field inside any conductor is always zero
So electric field at r = 1 cm
E = 0
Part b)
Now at r = 3 cm
By Gauss law



Part c)
Again when we use r = 4.50 cm
then we will have
Electric field inside the conductor is again zero

Part d)
Now at r = 7 cm
again by Gauss law


