What chromosome set is characteristic for gametophyte and gamete moss of sphagnum moss?

What chromosome set is characteristic for gametophyte and gamete moss of sphagnum moss? Explain from what initial cells and as a result of what division these cells are formed?

1) Gametophyte and sphagnum gametes are haploid, and the chromium set and the amount of DNA in the cells correspond to the formula nc. Gametes of cuckoo flax are formed on the haploid gametophyte by mitosis.
2) Gametophyte is formed from spores, which are formed as a result of meiosis from sporophyte tissues.
3) The spore is divided by mitosis, forming a gametophyte.

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