UNIX for Advanced & Expert Users

hello guys!! need 1 favour from u all..
Can u jst tell me the answers for these ques??
1. ls - l _____ : command to return all files that end with single digit and those with TXT extension
2. ls -l report* _______ : command to return all files that start with the word RPT except those with LOG extension
3. LPR _______ : command to print the result of diff log1 log2
Am not exposed to unix and so finding thes questions tuf. Please do help me out!! URGENT!! Thx u al..

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