Translation:We will do it gently
I agree with BwanaSimba. According to my Tanzanian Swahili teacher, you would normally put the object infix here. His lesson notes say:
The object marker is mainly used when there is no overt object noun or nominal in the sentence. Example:
Ulipenda kitabu changu? (Did you love my book?)
Ndiyo, nilikipenda. (Yes, I loved it.)
So in this example question, the overt object is kitabu (book) and in the response the object (book) is instead represented by the object infix -ki- (it).
Since there is no overt object mentioned in the sentence "Tutafanya taratibu" and the translation says "We will do it", there is a mismatch according to the explanation above. But maybe the course developers are showing that it is common to break this rule?
Don't suppose you could be clearer about what you're saying? It took me a while the first few times to notice the difference between what you put and the "answer", before realising you were including missing object infixes.
It is a great help, so certainly don't stop, it's just a little confusing sometimes. Even if you just bold the difference, that little bit more information would make it clearer.