Sketch the graphs and find the values of the following areas under the normal curve which lie from:

1. z = -0.63 to z = 0.63
2. z = -0.84 to z = 1.23
3. z = 0.26 to z = 0.97
4. z = -0.42 to z = -1.0
5. z = -1.23 to z = 2.23
6. z = 1.32 to z = 1.78
7. z = -0.75 to z = 2.10
8. z = -1.25 to z = 0
9. z = 0 to z = 2.20
10. and to the right of z =1.85
11. and to the right of z = -1.16
12. and to the right of z = 0.28
13. and to the left of z = -2.18
14. z = 0.86 and to its left
15. z = -2.33 and to its right
16. and to the left of z = 0
17. and to the right of z = 0
18. z = -1.75 and to its right
19. and to the left of -1.5 or from andto the right of 1.5
20. -2 to -1.2 and to 1.2 to 2
21. z = 0 to z = -1.25