Answer:
1. a. president and vice President
2. a. four year
3. a. cabinet
4. b. eight
Step-by-step explanation:
Executive branch is consisted out of president, vice president and the people that the president is appointing, and those are the members of his Cabinet. They are serving four years term, but can be re-elected, which means that totally they can serve for eight years. That is established by the 22nd Amendment, because until 1951 there were no limits.