1. Dr. Ben has hired a Word Processing Specialist to complete the type setting of a book he has been working on over the last year. Jennifer is her name, and she has six chapters on her desk that must be typed and proofread as soon as possible. Jennifer does the word processing and Dr. Ben does the proofreading. Some chapters are easy to type but more difficult to proofread. The estimated time (in minutes) for each activity is given below. In what order should Jennifer type the chapters so that the entire batch can be finished as soon as possible? When can Jennifer expect to be finished with the job (both word processing and proofreading)?

Chapter	Word Processing	Proofreading
1	30	20
2	90	25
3	60	15
4	45	30
5	75	60
6	20	30