What is the result of this code?

my$\_$first$\_$list $=[\text{'}$a$\text{'},\text{'}$b$\text{'},\text{'}$c$\text{'}]$

my$\_$second$\_$list $=[\text{'}$d$\text{'},\text{'}$e$\text{'},\text{'}$f$\text{'},\text{'}$g$\text{'}]$

my$\_$third$\_$list $=$ my$\_$first$\_$list $*2$

my$\_$third$\_$list.upper$()$

print $($my$\_$third$\_$list$)$

$[\text{'}$a$\text{'},\text{'}$b$\text{'},\text{'}$c$\text{'},\text{'}$a$\text{'},\text{'}$b$\text{'},\text{'}$c$\text{'}]$

$[\text{'}$A$\text{'},\text{'}$B$\text{'},\text{'}$C$\text{'},\text{'}$A$\text{'},\text{'}$B$\text{'},\text{'}$C$\text{'}]$

An error, because upper is not a method available for lists.

$[\text{'}$A$\text{'},\text{'}$B$\text{'},\text{'}$C$\text{'},\text{'}$d$\text{'},\text{'}$e$\text{'},\text{'}$f$\text{'},\text{'}$g$\text{'}]$