To find the total time for the relay team to complete the race, we need to sum the times of all four runners.
Here are the individual times:
- Jason: 42.51 seconds
- Ricky: 37.9 seconds
- Michael: 43.06 seconds
- Samuel: 39.25 seconds
Now, let's add them up:
\[ 42.51 + 37.9 + 43.06 + 39.25 = 162.72 \text{ seconds} \]
Thus, the total time for the relay team to complete the race is 162.72 seconds.
The correct answer is D. 162.72 seconds.