solve this please i will mark him/her the brainlest if they anyone solve it

Sam drives from home 40 km at constant speed of 60 km/h to pick his friend and another 80 km with a constant speed of 100km/h to reach the school

How much time did Sam take to reach his friend’s place from his home? *

1 point

1/3 hour

2/3 hour

4/3 hour

1 hour

How much time will he take to reach school after picking up his friend? *

1 point

1/5 hour

2/5 hour

3/5 hour

4/5 hour

How much time did Sam take to travel from home to school? *

1 point

22/5 hour

6/3 hour

6/5 hour

6/8 hour​