Unix/Linux please. thank you

1. Assume the output of the date command is 'mon jan 29 23:10:12 PST 2018'. The command to get output as - Date and Time: mon jan 29 23:10:12 PST 2018 is a. echo "Date and Time: $date" b. echo "Date and Time 'date'" c. echo "Date and Time: `date`" d. None of the above 2. Which of the following commands will output 21 (check all that apply)? a. x=7; y=3; echo (( $x * $y )) b. x=7; y=3; echo $(( $x * $y )) c. x=7; y=3; echo $(( x * y )) d. x=7; y=3; echo $x * $y 3. When the script foo -n -i bar[1-3] runs, what value does $# acquire? Consider that the files bar1, bar2 and bar3 already exist. a. 3 b. 4 c. 5 d. 6 4. Which statement is used to handle relational comparisons in the if conditionals? a. check b. test c. compare d. equals 5. Consider the variable path=/home/acs/home/acs/inbound/HERTZ_20170628.csv. Which of the following statement will return the file name HERTZ_20170628.csv? a. echo ${path#/*/} b. echo ${path##/*/} c. echo ${path%/*} d. echo ${path%%/*} 6. To destroy an array in a shell script, which of the following commands would you use? a. del arrayName b. remove arrayName c. unset arrayName d. clear arrayName