$1.$ What is an agent $?($not a "real estate agent" but an agent in general$).$

$2.$ What are the fiduciary duties that an agent owes the principal in an "agency relationship".

$3.$ in regard to a real estate agent, describe the fiduciary duties between the seller, the listing broker, and the real estate salesperson $($sub$-$agent$).$

$4.$ Identify at least one problem or conflict of interest which could occur in a real estate transaction that risks violating these fiduciary duties and how it might be avoided$\mathrm{.}$