Change the language to improve the following sentences to ensure unbiased references to race, gender, culture, age, or disability.
1) Jack is confined to a wheelchair. 
2) A company owned by a 65-year-old white woman earned a million dollars last year.
3) The exercise program was developed for handicapped people.
4) A young Asian man was arrested for leaving the scene of an accident.
5) This is obviously man’s work.
6) The student having difficulty with math should ask his instructor for help.
7) Dear Sirs: Please accept my application for the position as human resource manager.