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Answer:Magnetic field, B = 0.11 i (in k direction)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 protonB = 0.11So, 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....