A well located at x = 0, y = 0 injects water into an aquifer at Q = 1.0 cfs and observation wells are located along the x-axis at x = 10, 50, 150, and 300 ft away from the injection well. The confined aquifer with thickness of 10 ft has T = 3200 sq ft/day and S = 0.005. The injection is affected by the presence of a linear river located at x = 300 ft east of the injection well. Compute the head buildup along the x-axis at the observation well locations after 6 hr of injection?