2. Express the following numbers on a machine that allows only four digits, with rounding. (remember, zeros are place holders). (a) 9.482671 (b) 947382.334 5. Suppose two points (20, yo) and (21,91) are on a straight line with y + yo- Two formulas are available to find the x-intercept of the line: Formula 1: 2A = 2041-9190 Formula 2: Ig = 20 (x1 - x0)yo y1 - y yu-Yo (a) Show that both formulas are algebraically correct. (Algebraically show that 2A = (b) Use the data (20,40) = (1.31, 3.24) and (21,91) = (1.93, 4.76) and three-digit round- ing arithmetic to compute the x-intercept both ways. (c) Compare the relative errors for both methods (this means you will need to find the true value using full precision on your calculator). Which method is better and why