Drupal coding standard issues

FILE: C:\xampp\htdocs\drupal-9\web\modules\contrib\default_class\default_class.module
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FOUND 4 ERRORS AFFECTING 3 LINES
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1 | ERROR | [x] The PHP open tag must be followed by exactly one blank line
1 | ERROR | [x] End of line character is invalid; expected "\n" but found "\r\n"
9 | ERROR | [x] There must be one blank line after the last USE statement; 2 found;
17 | ERROR | [x] Expected 1 blank line before function; 2 found
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PHPCBF CAN FIX THE 4 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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Time: 226ms; Memory: 10MB