Compute: {{MATH_219}} by using the graph below {{CMD_220}} {{ENV_221}} {{COMMENT_222}} {{COMMENT_223}} {{COMMENT_224}} {{COMMENT_225}} {{COMMENT_226}} {{CMD_227}} {{CMD_228}} From the graph we can see that as {{MATH_229}} approaches {{MATH_230}} from the left, {{MATH_231}} remains at {{MATH_232}} up until the exact point that {{MATH_233}}. Hence {{MATH_234}} Also from the graph we can see that as {{MATH_235}} approaches {{MATH_236}} from the right, {{MATH_237}} remains at {{MATH_238}} up to {{MATH_239}}. Hence {{MATH_240}} {{CMD_241}} {{CMD_242}}