Final answer:
The average speed of the five bicyclists is 5.88 m/s.
Step-by-step explanation:
The average speed of the five bicyclists can be found by summing up their speeds and dividing by the total number of bicyclists. Here's how:
Speeds: 5.4 m/s, 5.7 m/s, 5.8 m/s, 6.0 m/s, and 6.5 m/s
Average speed = (5.4 + 5.7 + 5.8 + 6.0 + 6.5) / 5 = 29.4 / 5 = 5.88 m/s
Their average speed is 5.88 m/s, so the correct option is answer (c) 5.94 m/s.