Answer:
~100 cells,
Step-by-step explanation:
I counted around 102 cells in the picture. For your seond question I am a bit confused.
You asked what phase are they in and gave interphase, mitosis and cytokineses as the options. While interphase and cytokinesis are phases of mitosis. Therefore in theory all the cells are going through mitosis.
Since most of the cells are looking like dense balls, we can say they are going through interphase.
P.S. I also see some going through anaphase, metaphase and cytokinesis, but they are seldom in numbers compared to interphase cells.