please solve the question by hand calculation ,

don't resend same answer which is already there in chegg by other expert

Q2. Using the data given, find the best polynomial fit for the data. Compare your answer with Excel Calculations. 2.5 Marks This data set of size n = 15 (Yield data) contains measurements of yield from an experiment done at five different temperature levels. The variables are y = yield and x = temperature in degrees Fahrenheit. The table below gives the data used for this analysis. 2.9 Temperature Yield 1 50 3.3 2 50 2.8 3 50 4 70 2.3 5 70 2.6 6 70 2.1 7 80 2.5 8 80 9 80 24 1090 3.0 1190 3.1 1290 2.8 13100 3.3 14100 3.5 15100 3.0 2.9