Answer textbox is disabled - due date

How come that Chapter 2 and 3 have same due date?
Isn’t one chapter per week?
how can I submit answer now?

No. It was:

  • 0 then 1 week 1
  • 2 then 3 week 2
  • 4 and final week 3

We are in week 3. You were sent e-mails warning about due dates to the address you gave in your profile and even the week 3 warning has been sent.