Answer:
1. Esta
2. Es
3. Estoy
4. Son
5. Es
6. Es
7. Esta
8. Es
9. Esta
10. Son
11. Estan
12. Son
13. Somos
14. Son
15. Estoy
I showed in the picture below. This answer could vary because there are multiple sums of 84
It’s the same thing the word doesn’t change
Un, an easy way to tell is through the ending vowel.
The 'o' in boligrafo is masculine, so the there are two automatic answers brought forward, 'un', and 'el'.
Then, in english, it would be like saying 'the' or 'a' whereas the is either 'el' or 'la', while a a 'un' or 'una' respectively.