input: Write a python function to analyze the sentiment of a given text using TextBlob.
  assert analyze_sentiment("The product is good quality and well made.")=="Review is positive."
  assert analyze_sentiment("The product is okay.")=="Review is neutral."
  assert analyze_sentiment("The product is terrible.")=="Review is negative."
output: def analyze_sentiment(text):
      from textblob import TextBlob
      blob = TextBlob(text)
      polarity = blob.sentiment.polarity
      if polarity > 0:
          return "Review is positive."
      elif polarity < 0:
          return "Review is negative."
      else:
          return "Review is neutral."