I'm having problems solving questions relating to rational functions and I need help. The questions state that,

a. " It takes my sister 10 hrs to paint her room all by herself but if I help her it would take 6 hrs. How long would it take me to paint the room if I worked alone?"

and b. "My other sister can get the job done for 16 hrs since she takes a lot of breaks on her phone. If we were to work together how long would it take us to paint the room working together?"

l"l : I 2 mm. a) It takes my sister 19 hours to paint her room all by herself, but if I were to help her, it would take us 5 hours. How long would it take me to paint the room if I was working alone? In} My other sister can get the job done in 16 hours, since she takes a lot of breaks on Tik Tok and Instagram. If we were to all work together, how long would it take us to paint the room working together