$1.$ The rake angle in a single point turning tool affects the $\_\_\_$ of the cut.

$2.$ In parting operations, the tool must have a $\_\_\_$ width to minimize material wastage.

$3.$ Boring tools are designed with a $\_\_\_$ to ensure stability during internal machining operations.

$4.$ The primary characteristic of form tools is their ability to create complex shapes in a single $\_\_\_.$