A teammate is not performing well recently. How will you give them your feedback?

"The recruiter was very clear and prompt about the expectations and the reply time for emails was generally great. The technical interviews were all DSA and had a story built around the underlying question that the candidate has to uncover to get to the actual algorithm. The Googliness interview for me particularly was all 'how would you' questions instead of 'tell me about a time' questions, which surprised me a little and I probably did not do as well as I should have. Clarity of thought and conciseness in response is incredibly important for these interviews. For the onsites, both my interviewers were helpful and communicated really well. The second interviewer went really deep into the time and space complexity of Djikstra's, a couple layers below the standard answers and the follow-ups became increasingly complicated to answer. In hindsight, my overall interview loop focused on depth of DSA knowledge over doing all sorts of obscure medium and hard leetcode questions."