Analyze the following questions and answer them ?

a) Is the noon Sun directly overhead at the equator every day of the year? (In other words, do the vertical rays of the noon Sun strike the equator every day of the year?) If not, on which day or days of the year is the Sun directly overhead at the equator?

b ) Is the noon Sun ever directly overhead here in San Francisco? If not, on which day of the year is the noon Sun highest in the sky here, and on which day is it lowest?

c) Is the noon sun ever directly overhead at the North Pole? If not, on which day of the year is the noon Sun highest in the sky there.