$5.$ Write a R command to create a character vector named char$1$ with values $"$&$5","$Nd$","9$iC$","3$df$","$df$","$nd$","\_5","9$ic$".$

$6.$ Can you write an R command to sort the character vector created in question $5?$

$7.$ Write in words and based on the output from question $6,$ why $"3$df$"$ goes before $"9$ic$"?$

$8.$ Write in words and based on the output from question $6,$ why $"$&$5"$ goes before $"3$df$"?$