Suppose f . R 3 - gt; R is a differentiable function which has an absolute maximum value s and an absolute minimum m. Suppose further that in = Me

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Suppose f . R 3 - > R is a differentiablefunction which has an absolutemaximum value s and anabsolute minimum m. Supposefurther that in = Mewhat can be said about itsderivative Df ?D =) Find the coordinates of thepoints and the correspondingvalues of +. where the line( ( t s = ( x , y , z ) = ( 1 - t, it t, t )intersects the sphere x 2 + y z + z ? = )1t2 -1 ( t , )1 ( tz ) =