please i need help in unix programming. thank you

Question 181 pt

What will the below command do? grep '8\..' filename

Prints all lines start with the number 8 and followed by any digit

Prints all lines start with the number 8 and followed by any letter

Prints all lines ending with the number 8

None of the mentioned

Question 191 pts

What will the below command do? grep '\.7' filename

Prints all lines start with the number 7

Prints all lines end with the number 7

Prints any line not containing the expression .7

Prints any line containing the expression .7

None of the mentioned

Question 201 pts

What will the below command do? grep '^[we]' filename

Prints all lines beginning with either a w or an e

Prints all lines beginning with a w and followed by an e

Prints all lines ending with the we

None of the mentioned

Question 211 pts

What will the below command do? grep '[a?z]\{11\}' filename

Prints all lines containing at most eleven consecutive lowercase letters

Prints all lines containing at least eleven consecutive lowercase letters

Prints all lines containing lowercase letters followed by number eleven

None of the mentioned

Question 221 pts

What will the below command do? grep i 'north' filename

Prints all lines containing lowercase north letters

Prints all lines containing uppercase north letters

Prints all lines containing an uppercase n followed by lowercase o, r, t, and h letters

Both a and b

Question 231 pts

What will the below command do? egrep 'NA|EA' filename

Prints the lines beginning with either the expression NA or the expression EA

Prints the line if it contains NA and EA expressions

Is the same as grep '[N/E]A' filename command

None of the mentioned

Question 241 pts

What will the below command do? egrep '4+' filename

Prints all lines containing more than one occurrences of the number 4

Prints all lines containing one or more occurrences of the number 4

Prints all lines containing more than four occurrences of the number 4

None of the mentioned

Question 251 pts

What will the below command do? egrep '7\.?[09]' filename

Prints all lines containing a 7, followed by zero or one period, followed by a number

Prints all lines containing a 7, followed by one or more period, followed by a number

Prints all lines containing a 7, followed by one period, followed by one number

None of the mentioned