None of those should contain a variable.
It is where
In other word, find the amount of the 'jump' at k.
The distribution function of is given by
I have to find
For a) I figured possible values for the random variable were
Doing some subtraction I got:
I am confused. What is b? Is it a possible value that the random variable can take on? Also, is part a) the same thing as saying "find the probability mass function"?
And for part b), I am not sure where to begin with this one. Any help is appreciated.
Thank you very much.
(Also I apologize if the table is hard to read, that's the nicest I could get it with tex)