h$)$ The figure below shows three micrographs of dislocation networks in a copper foil viewed with $\backslash (\backslash$boldsymbol$\{$g$\}=\backslash )($a$)-111,($b$)11-1$ and $($c$)\backslash (1-11\backslash ).$ Given the Burgers' vector $\backslash (\backslash$boldsymbol$\{$b$\}\backslash )$ is of the form $\backslash ($ a and that the dislocations are invisible for $\backslash (\backslash$boldsymbol$\{$g$\}\backslash$cdot $\backslash$boldsymbol$\{$b$\}=0\backslash ),$ establish in which of the micrographs $\backslash (\backslash$mathrm$\{$a$\},\backslash$mathrm$\{$b$\}\backslash )$ and c the dislocations at $\backslash (\backslash$mathrm$\{$C$\},\backslash$mathrm$\{$E$\},\backslash$mathrm$\{$F$\}\backslash )$ and G $,$ are visible$/$invisible and determine their Burgers' vector. Note, E and F are dislocation lines, and C and G are small dislocation loops.