This is an average velocity and displacement problem..and I need help with how to set it up and solve

The arctic tern migrates farther than any other bird. Each year, the Arctic tern travels 3.20 ﾗ 104 km between the Arctic Ocean and the continent of Antarctica.Most of the migration takes place within two four-month periods each year. If a tern travels 3.20 ﾗ 104 km south in 122 days, what is its average velocity in kilometers per day?

Question

This is an average velocity and displacement problem..and I need help with how to set it up and solve

 The arctic tern migrates farther than any other bird. Each year, the Arctic tern travels 3.20 ﾗ 104 km between the Arctic Ocean and the continent of Antarctica.Most of the migration takes place within two four-month periods each year. If a tern travels 3.20 ﾗ 104 km south in 122 days, what is its average velocity in kilometers per day?