(a) Find the P - value for the test statistic $z = -1.76$ for the following null and alternative hypotheses:
$H_0$: The population mean is 8.
$H_a$: The population mean is less than 8.
The P - value is
(b) Find the P - value for the test statistic $z = -1.76$ for the following null and alternative hypotheses:
$H_0$: The population mean is 8.
$H_a$: The population mean is not equal to 8.
The P - value is