Assuming that the following variables have been declared:

String str$1="$Q$.$E$.$D$."$;

String str$2=$ "Arcturan Megadonkey";

String str$3=$ "Sirius Cybernetics Corporation";

evaluate the following expression. $($e$.$g$.,7\mathrm{.}0$ rather than $7$ for a double, Strings in quotes$).$

str$2+$ str$3.$charAt$(17)$