At sea level the pressure is 14.7 psi (pounds per square inch). Water pressure increases at a rate of 14.7 psi for every 30 ft of descent. a) Write the first four terms of the sequence that relates water pressure to feet of descent. Write the general term of this sequence. b) What is the water pressure at a depth of 1000 ft? 2000 ft? c) Sketch a graph of the water pressure versus 30-ft water depth charges. d) What is the y-intercept of the graph? e) What is the slope of the graph? f) How do the y-intercept and the slope relate to the formula you wrote in part a)?