An engine flywheel initially rotates counterclockwise at $6\mathrm{.}83re\frac{v}{s}.$ Then, over $24\mathrm{.}7s,$ its rotation rate changes to $3\mathrm{.}71re\frac{v}{s}.$ in

the clockwise direction.

Define counterclockwise rotation to be positive.

Detemrine the flywheel's average angular acceleration ${}_{\text{a}\text{v}\text{g}}.$

${}_{\text{a}\text{v}\text{g}}=,ra\frac{d}{s^2}$