Find the P-value for the given test statistic using the standard normal distribution and state the conclusion about the null hypothesis for the following using a significance level of a= 0.05:

a) The test statistic in a right-tailed test is z = 2.50.

b) The test statistic in a two-tailed test is z = -0.55.

c) The test statistic in a left-tailed test is z = -1.25.

d) The test statistic in a two-tailed test is z = 0.35.