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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
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I think you have done them correctly.
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Napkins passed the test because he studied hard and understood the material