Question 1150045
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You have the proper z scores for each sub-part. Nice work so far. 


To complete the problem, you'll need a z score table (a calculator is another option though it will depend on what your teacher wants). Many, if not all, statistics textbooks will have this table in the back of the book.


I'm using an online z score table found at <a href = "http://www.z-table.com/">http://www.z-table.com/</a> though you can use any table you want, as they would all say the same values. 
Here's a portion of the table
<img src = "https://i.imgur.com/ueQSql4.png">
Locate the row that starts with -2. I'm going to box it in with red marker 
<img src = "https://i.imgur.com/9L8p59X.png">
Now highlight the column that has 0.00 at the top
<img src = "https://i.imgur.com/g6z0uAY.png">
The row -2 and column 0.00 combine to -2+0.00 = -2.00 = -2
In short, this is like an address to find the proper value we want, which is 0.0228


This means P(Z < -2) = 0.0228 approximately


Therefore,
P(Z > -2) = 1 - P(Z < -2)
P(Z > -2) = 1 - 0.0228
P(Z > -2) = <font color=red size=4>0.9772 which is the final answer to part A</font> (this value is approximate)


I'll let you finish the rest. The other parts follow the same basic steps of using a lookup table to find the proper area, then subtract as you've indicated. 
Let me know if you still need help with either part B or part C. 
Also, feel free to ask me to check your answers. 
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