Severity: Warning
Message: fopen(/home/answnniz/solutionspile.com/system/sessions/ci_session165f8cc19cac7869de364af3a81bf4f72cbab153): failed to open stream: Disk quota exceeded
Filename: drivers/Session_files_driver.php
Line Number: 176
Backtrace:
File: /home/answnniz/solutionspile.com/index.php
Line: 367
Function: require_once
Severity: Warning
Message: session_start(): Failed to read session data: user (path: /home/answnniz/solutionspile.com/system/sessions)
Filename: Session/Session.php
Line Number: 143
Backtrace:
File: /home/answnniz/solutionspile.com/index.php
Line: 367
Function: require_once
Charlie and Paul have preferences over novels (x1 ) and science books (x2 ) occupying their bookshelves, and this year they each plan on spending $500 on books. Their preferences are represented by the utility functions