$1.)$ Open a blank part file, set the units to MMGS$,$ and start a new sketch on the Front Plane.

$2.)$ Recreate the sketch and make sure that it's fully defined. $($A$)$

$3.)$ Make sure that the four arcs indicated by the arrows have an equal relation. $($B$)$

$4.)$ Find the distance between the top circle and the origin $($in mm $).($C$)$

please help me solve