The probability generating function for a random variable SX$ is given by: $g (x}(z)=\frac(}{8) z^(2)+\frac{I(2) ZAC10)+\frac(1)(4) z^(20)+\frac(1) (8) z^(25)$ Find: 1. SEEX / 31$ 2. SP(X>20 \mid...

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Extracted text: The probability generating function for a random variable SX$ is given by: $g (x}(z)=\frac(}{8) z^(2)+\frac{I(2) ZAC10)+\frac(1)(4) z^(20)+\frac(1) (8) z^(25)$ Find: 1. SEEX / 31$ 2. SP(X>20 \mid x>10)$ 3. SEEIX-17|15 4. Fourth moment of $XS. sp. sv.038|