It would be helpful too see a detailed proof of this problem. I am having a hard time grasping the process. Thank you in advance!

II. Let o:(X,+,-) (X',+':') be a vector space homomorphism. Let n and n' be the additive identities in X and X', respectively. Define Ko = { e X: (*) = n'}. Prove ko s X'. Include a detailed diagram illustrating this proof. II. Let o:(X,+,-) (X',+':') be a vector space homomorphism. Let n and n' be the additive identities in X and X', respectively. Define Ko = { e X: (*) = n'}. Prove ko s X'. Include a detailed diagram illustrating this proof