Upon examining a sample consisting of 100 cells, you find the following distribution of cell phases. if you know that the cell cycle for this type of cell takes two hours, how long, on average, does the cell spend in prophase?

cell phase number of cells
interphase 54
prophase 25
metaphase 8
anaphase 7
telophase 6

a. 8 minutes
b. 16 minutes
c. 22 minutes
d. 30 minutes