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Required information

Problem $04\mathrm{.}020-$ Moment of a Force About a Point

The structure shown supports a force $F=15kN.$

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Problem $04\mathrm{.}020.$b $-$ Moment of a Force About a Point

Use the vector approach with the position vector from point $A$ to point $E,$ namely vec$(r{)}_{AE},$ to determine the moment of the force about point $A.($Round the final answers to four decimal places. Include a minus sign if necessary.$)$

The moment of the force about point $A$ is $($ hat$(i)+$ hat$(j)+$ widehat$(k).$