5: Which filter does character transformation? Otr sed more head tail 6: What would the command "tr A-Z a-z' do? Convert any lower-case letters on the input to upper-case letters. Convert any numbers on the input to lower-case letters. Pass the input unchanged. None of the other answers is correct. Convert any upper-case letters on the input to lower-case letters. 7: Which filter gives only the beginning of some output? O head more Ogr Otail Osort 8: Which sort key below specifies the first field on a line? None of the other answers is correct. Cannot be done +A O-k1,1 +1 9: Which filter gives only the end of some output? sed tail Otr Omore Osort 10: Which command, placed at the end of a pipeline, will show the first 25 lines of the output? None of the other answers is correct. Ohead +26-50 head +25.50 Ohead +25 tail -25 Ohead -25 15. Which flag to sort causes it to sort in descending order? O-a 0-C O. O No flag needed, this is the default behaviour None of the other answers is correct. 16: What would the command tr A-Z A-Z do? Convert any upper-case letters on the input to lower-case letters. O None of the other answers is correct. Convert any lower-case letters on the input to upper-case letters. Convert any numbers on the input to lower-case letters. Pass the input unchanged. 17: Which filter lets you rearrange the input in a different order? O more Osort grep None of the other answers is correct. sed 18: Which flag to sort causes it to suppress duplicate lines? No flag needed, this is the default behaviour. O-n O-a O-1 -u 19: Which command placed at the end of a pipeline, will show the last 25 lines of the output? O head +25 O tail -25 Omore +0-25 head +25-50 None of the other answers is correct. 20: Which sort key below specifies the last field on a line? O-k99.99 O+S None of the other answers is correct. O-ks, O Cannot be done using sort alone