The target of this exercise is to create a string, an integer, and a complex variable using command substitution. The string should be named BIRTHDATE and should contain the text "Jan $1,2000".$ The integer should be named Presents and should contain the number $10.$ The complex variable should be named BIRTHDAY and should contain the full weekday name of the day matching the date in variable BIRTHDATE e$.$g$.$ Saturday. Note that the 'date' command can be used to convert a date format into a different date format. For example, to convert date value, $date$1,$ to day of the week of date$1,$ use:

date $-$d $"$$date$1"+\%$A