need help can you show how to do this by hand. will thumbs up!

The data in the following table were obtained during a colorimetric determination of glucose in blood serum. (a) Assuming a linear relationship, find the least-squares estimates of the slope and intercept. (b) Use the LINEST function in Excel to find the standard deviations of the slope and intercept. 15 What i the standard error of the estimate? (c) Determine the 95% confidence intervals for the slope and intercept. (d) A serum sample gave an absorbance of 0.350. Find the glucose concentration and its standard deviation