Question 3 (lmarks) Supply and demand analysis can also involve two interrelated markets. Use either elimination or substitution methods to find '2? and '2 g; for each of the following three markets, given the system of equations; ?Sl6?l+8=0 ??1+5?1?2?323=0 ?523?2+11:O ?._,2?1+3?22?315:O ?53_3?3+5=O ??3?12?2+4?319=O (16) Question 4 (Smarks) Consider the following Cobb-Douglas production function ? = 15? 0375 ?D.625 Find i. '3? ? (3) ii. \".2? ? (3) iii. Calculate and comment on the returns to labour. (3)