The P-value for a right-tailed test is P=0.042. Which of the following is INCORRECT?

a. The P-value for a two-tailed test based on the same sample would be P=0.084

b. The P-value for a left-tailed test based on the same sample would be P=-0.042

c. The z-score test statistic is approximately z=1.73

d. We would reject H0 at "alpha=0.05, but not at "alpha=0.01