Summer solstice,Vernal equinox

73.    Approximate the number of hours of daylight at the Equator (0° north latitude) for the following dates:

(a)     Summer solstice (i = 23.so)

(b)     Vernal equinox (i = 0°) (c) July 4 (i = 22°48')

(d) What do you conclude about the number of hours of daylight throughout the year for a location at the Equator?

74.    Approximate the number of hours of daylight for any loca­ tion that is 66°30' north latitude for the following dates:

(a)     Summer solstice (i = 23 .5° )

(b)     Vernal equinox (i = 0°)