How can i create VBA function like this

Question

Write a user-defined function which returns the appropriate greeting depending on the time.
a) Use the VBA-function “ Hour” to obtain the hour from a date/time entered into some
particular cell. Call your function “ helloHour” . When the time is 0:00-12:00, your function
should return “ Good Morning!” , for 12:00-18:00 it should return “ Good Afternoon!” , for
18:00-22:00 it should return “ Good Evening!” and for 22:00-23:00 it should return “ Good
Night !” .
b) Write a new function called “ helloWinter” which is more suitable for winter time. When
the time is 0:00-12:00 your function should return “ Good Morning!” , for 12:00-16:00 it
should return “ Good Afternoon!” , for 16:00-21:00 it should return “ Good Evening!” and
for 21:00-23:00 it should return “ Good Night !” .
c) Write a function called “ helloBoth” which uses the autumn-winter greeting “
helloWinter” from November to April and otherwise “ helloHour” .

Answer 1

VBA isn't really a language that this platform covers anymore or at least at the moment, but if you provide the code you have so far, maybe someone would be willing to look at it.
Looking forward.