Answer
See below.
Work Step by Step
Let $P(2)=P(4)=P(1)=P(3)=P(5)=x$. We also know that $P(2)+P(4)+P(1)+P(3)+P(5)=1$, thus $x+x+x+x+x=1\\5x=1\\x=0.2$.
Thus $P(2)=P(4)=P(1)=P(3)=P(5)=0.2$.
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