exam Maths Puzzle Numerical Ability

please help me
let f(X)=x/6 , x=1,2,3,zero elsewhere be the pdf of x , find the distribution function and the pdf of y=x^2

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exam Other Question

Can someone show me the answer to this question from a previous exam i have recently take please. thankyou.

Emperical Rule

Approximately what percentage of people have temperatures between 96.34 and 98.2 degrees?
factor each expression:

8-m^6