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Determine if each of the following stress$-$rates of the Kirchoff stress tensor $$ is objective under a rigid body rotation $Q$ :

a$)={}^{}-l*-*l^T$

b$){}^{\text{g}\text{r}\text{a}\text{d}}={}^{}+*{}^{}-{}^{}*$

c$)={}^{}+d^T*+*d$