CONFIDENTIAL ESTION 1 (20 MARKS) Based on the statistical report of global environmental society Z, the global leaching rate in the unit of ppm/d) of the nickel (91), cobalt (92), and iron (93) from municipal landfill sites to nearby water bodies are described by the three linear algebraic equations below. Determine the global leaching rate of the nickel (q), cobalt (92), and iron (93) via lower-upper (LU) decomposition. -14.2191 + 5.8792 + 6.2993 = 4965.09 9,8691 - 12.7392 + 7.2893 = -5816.02 6.1891 +5.4492 - 9.7693 = 5981.40 (a) Develop the upper and lom 6.1891 +5.4492 - 9.7693 = 5981.40 (a) Develop the upper (U] and lower [L] triangular matrices. (10 Marks) (b) Develop the intermediate matrix [D]. (5 Marks) (c) Determine the global leaching rate of nickel (q), cobalt (92), and iron (93)