The widths of platinum samples manufactured at a factory are normally distributed, with a mean of 1.4 cm and a standard deviation of 0.5 cm. Find the z-scores that correspond to each of the following...

The widths of platinum samples manufactured at a factory are normally distributed, with a mean of 1.4 cm and a standard deviation of 0.5 cm. Find the z-scores that correspond to each of the following widths. Round your answers to the nearest hundredth, if necessary.


(a) 1.8 cm


z =


(b) 0.4 cm


z =