Someone hands you the following excerpt of the Y and Y-hat values for five observations used in a regression analysis. Which of these five observations has the smallest squared residual? What is the sum of the squared residuals for these five observations? (You will need to make some calculations in order to answer these two questions; please show all relevant work so we can keep track of your thought process.)

Obs Y Y-hat 231 226 343 327 W N 357 365 274 265 UA 183 239