Work efficiency: (2/3- 1/6*3) divided by (6-3) =118.

Time of Party A and Party C: 1 divided by (112+118) = 36/5 hours.

9.A 9 minutes +A 4 minutes +A 10 minutes +B points.

A 10 point enters the 2/3 pool-1/3= 1/3.

Pump A and pump B 1/3 divided by 10*4=2/ 15.

A score of 9 becomes1/3-2/15 =1/5.

A work efficiency: 1/5 divided by 9= 1/45.

Ergonomics: 1/3 divided by10-1/45 =1/90.

1/3 B needs: 1/3 divided by 1/90=30 points.

9+4+ 10+30=53 points

I hope I can help you!