Q:

Finding the Z value from the tail area of a distribution

Hi everyone. I'm really struggling with question v). I can't look up 0.99...
Here are the answers I have so far:
i) 1.64
ii) -1.64
iii) 2.05
iv) -2.12

Thanks in advance!

A:

Your answers look fine 
The last is about $-2.326348$.

