Chapter 3 - Section 3-3 - Cumulative Distribution Functions - Exercises - Page 73: 3-43

$F(x)=\left\{\begin{array}{ll}{0,} & {X<1.25} \\ {0.2,} & {1.25 \leq X<1.5} \\ {0.6,} & {1.5 \leq X<1.75} \\ {0.7,} & {1.75 \leq X<2} \\ {0.9,} & {2 \leq X<2.25} \\ {1} & {X \geq 2.25}\end{array}\right.$

$F(x)=\left\{\begin{array}{ll}{0,} & {X<1.25} \\ {0.2,} & {1.25 \leq X<1.5} \\ {0.2+0.4=0.6,} & {1.5 \leq X<1.75} \\ {0.6+0.1=0.7,} & {1.75 \leq X<2} \\ {0.7+0.2=0.9,} & {2 \leq X<2.25} \\ {1} & {X \geq 2.25}\end{array}\right.$