Answer:
E = 0.0130 V/m.
Step-by-step explanation:
The electric field is related to the potential difference as follows:

Where:
E: is electric field
ΔV: is the potential difference = 3.95 mV
d: is the distance of a person's chest = 0.305 m
Then, the electric field is:

Therefore, the maximum electric field created is 0.0130 V/m.
I hope it helps you!