Data analysis

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A study was performed to investigate the shear strength of soil (y) as it related to depth in feet (x1) and moisture content ()0. Ten observations were collected, and the following summary quantities obtained: 11 = 10. Ex... = 223, 21;: = 553, Eyj = 1,916, M: = 5200.9. 2x32 = 31'729. Exnx = 12.352. 2x..y, = 43.5503, Bray.- = 104.?36.8. and By} = 3? [5916. Set up the least squares normal equations for the model 1f=i3o+i3|1|+'2zfz'l'e- O a. y=171.o54+3.714[x1)1.126{x2) O 13- y=1?9.834+4.42?(x1)2.221(X2) O c. y:163.o21+3.273(x1)1.621(X2} 0 d. none