A test for the population mean, when the population SD is not known, is carried out based on a sample of size 12. The null hypothesis is that = 20, and the alternative is that < 20. The test statistic value is 2.45. Using a suitable table, what is the P-value?

(a) 0.0071

(b) large enough that the null hypothesis should not be rejected.

(c) between 0.02 and 0.04

(d) between 0.01 and 0.02

I am aware of the answer but unsure of the following work, if one could assist.