Объясни почему не подходит 'is going', 'go', или 'going'

{"is going"=>"is going' is incorrect because the subject 'my friends' is plural and requires a plural form of the verb 'to be', which is 'are'.", "go"=>"'go' is incorrect because it's the simple present form of the verb, and it doesn't fit in this sentence talking about a planned future action. The present simple is not typically used for planned events in the near future, and the sentence requires the present continuous tense.", "going"=>"'going' alone is not a complete verb phrase and doesn't correctly function as a verb in the present continuous tense. It needs a helping verb like 'are' or 'is' before it."}