Find the total area bounded by the graphs of f left parenthesis x right parenthesis equals x squared plus 2 x and g left parenthesis x right parenthesis equals short dash x plus 4 on the interval left square bracket short dash 4 comma 2 right square bracket. a.) 71 over 3 space u n i t s squared b.) 18 space u n i t s squared c.) 23 over 3 space u n i t s squared d.) 139 over 12 space u n i t s squared