There is a number 14 in cell A1, and there is a list of number under column B,
for example,
8, 11, 16, 18, 21
I would like to determine the value within the list, which is closest to 14,
and 16 should be returned in cell A2.

8, 12, 16, 18, 21
I would like to determine the value within the list, which is closest to 14,
and because 14 is between 12 and 16, then I prefer the larger number, and 16
should be returned in cell A2.

Does anyone have any suggestions on how to do it in Excel?
Thanks in advance for any suggestions
Eric