1) Adjust the network shown below by the method of least squares. (10 pts.) B D Angle BAC 38 48 52.5" CBA 90 02 25.5" 3.1= DCA 51 18 21.9" 2.3 CAD 47 46'13.1" 2.3 ACB 51 08 53.23 2.6 The coordinates (m) for control stations are: A: x = 4356.78 y = 2340.97 B: x = 4359.83 y = 3981.00 a) What is the reference standard deviation, So? b) List the adjusted coordinates of the unknown stations and their standard deviations. c) Tabulate the adjusted observations, their residuals and their standard deviations. d) Compare your results with the ones which you obtained in the Assignment-6 and comment on them