" (a) An individual is 'unemployed' in any week in which he or she meets any of the following conditions:
(1) Any week during which he or she performs no services and with respect to which no wages are payable to him or her.
(2) Any week of less than full-time work, if the wages payable to him or her with respect to the week, when reduced by twenty-five dollars ($25) or 25 percent of the wages payable, whichever is greater, do not equal or exceed his or her weekly benefit amount . . .
(4) Any week during which he or she performs full-time work for five days as a juror, or as a witness under subpoena."