What chromosome set is typical for vegetative, generative cells and sperm of pollen grains of cherries?

What chromosome set is typical for vegetative, generative cells and sperm of pollen grains of cherries? Explain from what source cells and as a result of what division these cells are formed.

1) Microspores are formed as a result of meiosis from maternal spore cells (sporogenous tissue).
2) Vegetative and generative pollen grain cells are formed as a result of mitosis of microspores.
3) Sperm are formed as a result of mitosis of the generative cell
4) All named cells are haploid

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