Let vec$(a)=($:$7,5$:$)$ and vec$(b)=($:$-5,8$:$).$

Compute the following vector projections.

$pro{j}_{\text{v}\text{e}\text{c}(a)}$vec$(b)=$

$pro{j}_{\text{v}\text{e}\text{c}(b)}$vec$(a)=$