To help pay for college, you worked part$-$time at a local restaurant, earning $$21,000$ in wages and tips. Use the following information to complete parts $($a$)$ through $($c$)$

$\backslash$table$[[,\backslash$table$[[$Matching Rates Paid by$],[$the Employer$]],$Self$-$Employed Rates$],[\backslash$table$[[7\mathrm{.}65\%$ on first $$142,800$ of$],[$income$]],\backslash$table$[[7\mathrm{.}65\%$ on first $$142,800$ paid$],[$in wages$]],\backslash$table$[[15\mathrm{.}3\%$ on first $$142,800$ of net$],[$profits$]]],[,\backslash$table$[[1\mathrm{.}45\%$ of wages paid in$],[$excess of $$142,800$