Question 1: The shear stress in kps /ksf of nine specimens taken at various depths in a clay stratum are: 2.0 4.3 5.2 5.9 7.0 8.2 9.4 10.1 Depth, m (x) Stress, ksf (y) 3.2 0.6 0.3 0.5 0.8 0.7 1.1 1.5 1.3 1.6 A. Estimate the shear stress at a depth using lagrange polynomial B. Find the least square line co-efficients of the date points: C. Use Cubic interpolation for M and write down the least-square polynomial: Write a correct prototype for the function below area = float FindArea(float radius, float area) { 3.14 * radius * radius; return area; } (1.5 Points)