8. Consider the functions s and g defined by the graphs in Figure 1.9.11 and Figure 1.9.12. Assume that to the left and right of the pictured domains, each function continues behaving according to the trends seen in the figures. y = s(t) 2 00 g 3+ 2+ ZA -4 -2 -2. -4 2 4 -1 -1 1 2 3 Figure 1.9.11. The graph of a piecewise function, s. Figure 1.9.12. The graph of a piecewise function, g. a. Determine a piecewise formula for the function y = s(t) that is valid for all real numbers t. b. Determine a piecewise formula for the function y = g(x) that is valid for all real numbers x. c. Determine each of the following quantities or explain why they are not defined. i. (sg)(1) iii. (sg)(1.5) ii. (gs)(3) iv. (gos)(-4)