(CO 4) Determine the minimum sample size required when you want to be 75% confident that
the sample mean is within twenty units of the
population mean. Assume a standard deviation of
327.8 in a normally distributed population

from the sentence, "tomorrow morning, akiko will arrive an hour late" depicts a third person perspective because it doesn't use any pronoun to replace akiko, the subject of the sentence, and it is in singular form since akiko is only one person.

h * s * a

h = history teacher

s = science teacher

a =   art teacher.

i see no data table, but just multiply the number of history teachers, science teachers, and art teachers.