The time required to assemble an electronic component is normally distributed with a mean and a standard deviation of 34 minutes and 20 minutes, respectively. [You may find it useful to reference the z table.]

a. Find the probability that randomly picked assembly takes between 26 and 40 minutes. [Round your final answer to 4 decimal places.]

b. It is unusual for the assembly line to be above 56 minutes or below 13 minutes. What proportion of assembly times fall in these unusual categories? [Round your final answer to 4 decimal places.]