Consider the data for a simple project at Carlos Lopez's real estate development company, as given in the following table.

a$)$ The expected completion time of the project is $34\mathrm{.}8$ days $($enter your response rounded to one decimal place$).$

b$)$ Referring to the standard normal table, the probability of the project being completed within $38$ days is $\%($enter your response rounded to one decimal place$).$