$P(X < 2) = \int_{0}^{2} \frac{1}{5} dx$

$P(X < 2) = \int_{0}^{4} \frac{1}{5} dx$

$P(X < 2) = \int_{2}^{5} \frac{1}{5} dx$

$P(X < 4) = \int_{0}^{2} \frac{1}{5} dx$