The determination of the nature, amount, and duration of alimony is based on the court’s weighing of several factors. Among the factors considered by the court in its alimony determination are the following: (1) the relative earnings of the parties; (2) the ages and the physical, mental, and emotional conditions of the parties; (3) the sources of income of both parties, including, but not limited to, medical, retirement, insurance, or other benefits; (4) the expectancies and inheritances of the parties; (5) the duration of the marriage; (6) the contribution by one party to the edu