can you explain clearly

Tutorial Exercise Find the critical members of the function. 72 - 2y + 12 Stop 1 For gly) = . we have y? - 2y + 12 + 12) (x/2 - 27 + 12)2 (12 - 2v+ 12)- Step 2 Critical numbits uccur where 7\\y) equals o or is undefined. q'(y) is undefined where the quadratic y - >y - 12 in the denominator is 0. So, g'() is undefined for the following values. (Enter your answers .is a comma separated list. If an answer does not Print, unter ONE.} V =DNE ONE Step 3 Since there are no real roots for yo - 2y + 12, gly) exists for all real turnbers. This means critical numbers occur where 0 " g(y) =- y(12 - F) (x3- 2y - 12) This happens only when the numerator equals 0. Thus, the critical numbers are as follows. (Enter your answers as a comma separated list. If an answer does not exist, enter ONE. ) y = 10.12 0. 12