Simple, Compound and Complex Sentences.

Have I interpreted the theory correctly?

1. The teacher walked into the classroom, greeted the students, and took attendance.
a. Simple ? (subject and predicates)
b. Compound
c. Complex

2. Juan played football while Juanita went shopping.
a. Simple
b. Compound
c. Complex ? (main clause and subordinate clause)

3. Juan played football, yet Juanita went shopping.
a. Simple
b. Compound ? (two simple sentences with coordinating conjunction)
c. Complex

4. Although Mexico has the better football team, it lost.
a. Simple
b. Compound
c. Complex ? (main clause and subordinate clause)

5. The island was filled with many winding trails, a small lake, and dangerous wild pigs.
a. Simple ? (subject and predicates)
b. Compound
c. Complex