can you guys help me?

a, When President Bush made his nomination acceptance speech in 1992, he stated "Who do you trust to make change work for you?", Should President Bush have used the word "who" or the word "whom?'

Briefly and correctly state why.

b, What pronoun error did President Obama make when he said, "Well, President Bush graciously invited Michelle and I to meet with him and first lady Laura Bush."? Using a complete, correct sentence, write the correct pronoun and your reason for the correct pronoun.

c, In one brief, correct statement, state why you think the press was so quick to point out President Obama's grammatical mistake?

d, In one brief, correct statement, state why it is important for a President to use proper grammar.

e, In one brief, correct statement, state why you believe these two presidents made these pronoun errors.

f, In one brief, correct statement, state why you believe these pronoun errors were intentional or accidental errors.

Thanks so much.