For each of the following situations, compute the missing amount.

$\backslash$table$[[$Balance Sheet,$],[$a$.$ Assets,$$,52,600,$Liabilities,$$,11,900,$Net worth,,$],[$b$.$ Assets,$$,83,300,$Liabilities,,,Net worth,$$,21,600],[$c$.$ Assets,$$,50,500,$Liabilities,$$,20,800,$Net worth,,$],[$d$.$ Assets,,,Liabilities,$$,47,800,$Net worth,$$,57,800]]$