Use a Graphing Utility to Graph the Function $f ( x ) = \sqrt { x } + \cos \frac { x } { 2 } \text { and locate the }$

Use a graphing utility to graph the function $f ( x ) = \sqrt { x } + \cos \frac { x } { 2 } \text { and locate the }$ absolute extrema of the function on the interval $[ 0,2 \pi ]$

A) left endpoint: $( 0,1.000 )$ absolute minimum right endpoint: $( 2 \pi , 1.507 )$ absolute maximum critical points: none
B) left endpoint: $( 0,0.000 )$ absolute minimum right endpoint: $( 2 \pi , 2.507 )$ absolute maximum critical points: none
C) left endpoint: $( 0,1.000 )$ absolute minimum right endpoint: $( 2 \pi , 1.507 )$
critical points: $( 1.729,1.964 )$ absolute maximum
D) left endpoint: $( 0,2.507 )$ absolute maximum right endpoint: $( 2 \pi , 0.000 )$ absolute minimum critical points: none
E) left endpoint: $( 0,1.000 )$ absolute minimum right endpoint: $( 2 \pi , 1.964 )$ absolute maximum critical points: $( 1.729,1.507 )$