Given the following pairs of z-values, find the area under the normal curve between each pair of z-values. Refer to the table in Appendix B.1. (Round the final answers to 4 decimal places.)
a. z = -1.65 and z = 0.25
b. z = -1.75 and z = -1.25
c. z = 1.43 and z = 2.52
d. z = -2.5 and z = 1.48
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