Firstly, I must apologise for the poor notation. I tried to use the \array command but I couldn't get it to work.

1) The random variable Q has P.D.F given by:

if

otherwise

Find k (answer: )

2)The random variable J has probability density function if

otherwise

Find k (answer: 2)

I honestly don't know where to start because I missed a lesson and am trying to catch up, but reading and retaining information can be a lot harder than being taught it.