Amber's employer, Lavender, Inc., uses a $401(k)$ plan that permits salary deferral elections by its employees. Amber's salary is $$99,000,$ and her marginal tax rate is $24\%$ and she is $42$ years old.

a$.$ What is the maximum amount Amber can elect for salary deferral treatment for $2022?$

$

b$.$ If Amber elects salary deferral treatment for the above amount, how much can she save in Federal income taxes?

Her tax liability for $2022$ would be reduced by $

c$.$ What is the recommended amount that Amber should elect as salary deferral treatment for $2022,$ considering only the Federal income tax effects?