Researchers collected information on the body parts of a new species of frog. The thumb length for the female frog has a mean of 5.47 mm and a standard deviation of 0.56 mm. Let x denote thumb length for a female specimen.

a. Find the standardized version of x. (Do not simplify. Use integers or decimals for any numbers in the expression. Do notround.)

b. Determine and interpret thez-scores for thumb lengths of 6.3 mm and 4.7 mm. Round your answers to two decimal places.