Calculus - functions, method of Least Squares

Please ONLY answer questions 1, 4a, 4b, 4c, 4d, 6a, 6b and 6c. 

Please also show as much working out as possible, thank you!

Answer

Answers can only be viewed under the following conditions:
  1. The questioner was satisfied with and accepted the answer, or
  2. The answer was evaluated as being 100% correct by the judge.
View the answer

1 Attachment

The answer is accepted.
Join Matchmaticians Affiliate Marketing Program to earn up to a 50% commission on every question that your affiliated users ask or answer.