How old are the boys and girls?

Male freshman, everything depends, male sophomore, never sophomore. Boys and girls have backers. Senior male, everything is fine. Male big five, the heart has me. Male sixth grade, love me. Male seventh grade, good thing. Eight men made money to send me flowers. Male big nine, former uncle. Ten men and ten husbands. Female freshman, happy life. Female sophomore, holding Lin's son. Girl, take the gold brick. Senior girl, everything goes well. Girl 5, yell at him. Sixth grade female, Passepartout. The seventh and seventh wives of women's universities. Female eight, must send, female nine. There is no shortage of meat or wine. Ten girls are perfect model wives.