A slab is subjected to two forces $\overrightarrow { \mathrm { F } } _ { 1 }$ and $\overrightarrow { \mathrm { F } } _ { 2 }$ of same magnitude $F$ as shown in the figure. Force $\overrightarrow { \mathrm { F } _ { 2 } }$ is in XY plane while force $\mathrm { F } _ { 1 }$ acts along $z$-axis at the point $( 2 \vec { i } + 3 \vec { j } )$. The moment of these forces about point O will be:
(1) $( 3 \hat { i } - 2 \hat { j } + 3 \hat { k } ) \mathrm { F }$
(2) $( 3 \hat { i } - 2 \hat { j } - 3 \hat { k } ) \mathrm { F }$
(3) $( 3 \hat { i } + 2 \hat { j } - 3 \hat { k } ) \mathrm { F }$
(4) $( 3 \hat { i } + 2 \hat { j } + 3 \hat { k } ) \mathrm { F }$