Matthew.

a. Was Matthew the first gospel written?
Mark was the first.

b. What does "Gospel" mean?
It means good news.

c. What promise does Malachi close the OT with?
That God will send a Messiah to fix Israel's problems,and to bring peace and joy to the people.

d. What does Matthew declare as he opens up the NT?
That the Messiah has come at last.

e. What does Matthew convince readers of?
He promise fulfilled prophecies divinely insightful teachings and miracles to convince Jews and other faiths that their expectations were off mark.

f. Who wrote Matthew? When was it written?
Matthew, and it was written after 70 AD