You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is 4050 births in a year in a city out of which 50 were still births. 50 died in first 7 days while another 150 died in first 28 days. What is the Neonatal mortality rate of the city? and explain in detail?
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