Waiting for your answers... Answer the following work problem. Report your answer to the nearest tenth of a week. Alone, Henry can do a certain job in 21 weeks. When Henry and Alice work together, they can finish the same job in 15 weeks.How long would it take Alice to do the job alone? weeks

Alone, Henry can do a certain job in 21 weeks. When Henry and Alice work together, they can finish the same job in 15 weeks.How long would it take Alice to do the job alone?