Terry Tortoise and Rabby Rabbit are best friends. Their home is 150 km apart. One day, they decided to meet. So Terry and Rabby started walking and running respectively towards each other at uniform speed at 9 am and they meet each other at 3:48 pm in the afternoon. Rabby runs at a speed 24 km/hr and stopped to take a nap after every 12 km He takes a nap for 15 minutes. Had Rabby made the journey without taking rest, they would have met 108 minutes earlier.Based on the information given below and answer the following questions.Question: At what speed Terry should walk so as not to allow Rabby his 7th nap?

1) 13.2 km / hr
2) 12.8 km / hr
3) 12 km / hr
4) 14 km / hr