41 and 1/5 miles.
You can get this by multiplying the distances by number of days. Then add the two together.
To order these, it's easiest to find their decimal to better understand their value:
1/5 = 0.2
2/3 = 0.66666...
5/8 = 0.625
now order them from least to greatest. 0.2 is your smallest decimal here, followed by 0.625, and 0.66666 is last. change them back to fraction form: 1/5, 5/8, 2/3. this is the order from least to greatest.
6 is the only possible answer