4. Using the station coordinates and trilateration data given below: a) Construct the matrix. (16) b) Construct the K vector. (8) c) Construct the W matrix. (8) Initial approximations; Ego = 119,665.336 m, Ngo = 53,809.452 m. Control Stations Station B c. D Em 100,643.154 101,093.916 137,515.536 139,451.837 N (m) 38,213.066 67,422.484 67,061.874 37,544.403 Distance Observations From B D To E E E E Distance (m) 24,598.543 23,026.189 22,231.945 25,613.764 S (m) 0.074 0.069 0.067 0.077 4. Using the station coordinates and trilateration data given below: a) Construct the matrix. (16) b) Construct the K vector. (8) c) Construct the W matrix. (8) Initial approximations; Ego = 119,665.336 m, Ngo = 53,809.452 m. Control Stations Station B c. D Em 100,643.154 101,093.916 137,515.536 139,451.837 N (m) 38,213.066 67,422.484 67,061.874 37,544.403 Distance Observations From B D To E E E E Distance (m) 24,598.543 23,026.189 22,231.945 25,613.764 S (m) 0.074 0.069 0.067 0.077