What is the first name of the person that the workaholic is worried might cancel the marriage?  Answer the above question based on the context below:  Sabrina Fairchild is the young daughter of the Larrabee family's chauffeur, Thomas, and has been in love with David Larrabee all her life. David is a playboy, constantly falling in love, yet he has never noticed Sabrina, much to her dismay. Sabrina travels to Paris for a fashion internship at Vogue and returns as an attractive, sophisticated woman. David, after initially not recognizing her, is quickly drawn to her despite being newly engaged to Elizabeth Tyson, a doctor. David's workaholic older brother Linus fears that David's imminent wedding to the very suitable Elizabeth might be endangered. If the wedding were to be canceled, so would a lucrative merger with the bride's family business, Tyson Electronics, run by her father Patrick. This could cost the Larrabee Corporation, run by Linus and his mother Maude, in the neighborhood of a billion dollars. Linus tries to redirect Sabrina's affections to himself and it works. Sabrina falls in love with him, even though she quotes others as calling Linus "the world's only living heart donor" and someone who "thinks that morals are paintings on walls and scruples are money in Russia." In the process, Linus also falls in love with her.  Unwilling to admit his feelings, Linus confesses his scheme to Sabrina at the last minute and sends her back to Paris. Before she gets on the plane to Paris, her father informs her that over the years of chauffeuring the father of David and Linus, he listened. When Mr. Larrabee sold, he sold and when Mr. Larrabee bought, he bought. Sabrina jokingly says "So you are telling me that you have a million dollars?" Her father says no, he has a little over two million and that her mother would want her to have it.
The answer to this question is:
David