Project management PMP Certification, if a hazard has $20\%$ chances of occuring in a certain month and the project is expected to last $5$ months, what is the probability that the hazard event will occur in the fourth month of the project?

$($a$)0\mathrm{.}05$

$($b$)0\mathrm{.}2$

$($c$)0\mathrm{.}8$