I'm stuck and really need

in the sentences below identify the underlined phrase. i put a * next to the underlined phrases.

1. the five senses enable us *to interact* with our world.

a. prepositional < i think it s this one
b. participle
c. gerund
d. infinitive

2. the idea of alien life, *proposed many years ago*, has not yet been proven.

a. prepositional < i think it s this one
b. participle
c. gerund
d. infinitive

3. *according to the letter*, the wedding is june 25th.

a. appositive
b. participle < i think it s this
c. gerund
d. prepositional

4. mikayla s homeroom teacher, *mr. jones*, is very proud of her.

a. participial
b. gerund
c. appositive < i think it s this
d. prepositional

5. henry s desire *to win* is obvious.

a. gerund
b. infinitive < i think it s this
c. prepositional
d. participle

6. *talking* is not allowed in class.

a. preposition
b. gerund < i think it s this
c. appositive
d. infinitive

any is appreciated : )