Answer:
Magnetic field, B = 0.11 i (in k direction)
Step-by-step explanation:
It is given that,
Velocity of the proton,

Magnetic force,
(due south)
The magnetic force acting on the electron is given by :

(-j) = (i) × (B)

q is the charge on proton

B = 0.11
So, the magnitude of 0.11 T is acting on the proton in and is acting directed upward above the plane. Hence, this is the required solution.