A 68-ft long pre-stressed concrete pile with square cross section (14 inch) is driven into the soil profile shown in Fig. 2. a) Compute the ultimate compressive load that can be carried by that pile (Toe and side friction loads). b) If the water table goes up to the ground surface, determine the effect on the pile ultimate axial capacity. Pre-stressed Square pile 40 ft Medium Stiff Clay S₁ = 1500 psf - y= 110 pcf Water Table Medium dense Sand 9=35° 28 ft y= 110 pcf N60 = 28 Fig. 2