$3.$ World$-$famous supermodel Cindy Crawford $("$Crawford$")$ enters into a contract with world$-$famous hair stylist Vidal Sassoon $("$Sassoon$")$ in which Sassoon agrees that he will trim and style Crawford's hair every month for a $$500$ monthly payment from Crawford. Sassoon then delegates his performance obligation under the contract to trim and style Crawford's hair to former President Donald Trump's hair stylist $("$DT Stylist"$).$ Can Crawford object successfully to this delegation by Sassoon to DT Stylist? Can she refuse to pay the $$500$ monthly fee? Why or why not?

$4.$ Assume the same facts as set forth in the previous question $($number $3),$ except that the contract between Crawford and Sassoon is about providing hair care and hair$-$styling equipment and products $$ in other words, Crawford enters into a contract with Sassoon in which Sassoon will provide to Crawford a continual supply of hair$-$care and hair$-$styling equipment and products $($specialized combs, brushes, blow$-$dryers, curling irons, hair extensions, shampoos, conditioners, dyes, etc.$)$ in exchange for $$500$ per month. Sassoon then delegates to DT Stylist his performance obligation under the contract to provide the equipment and products to Crawford. Can Crawford object successfully to this delegation by Sassoon to DT Stylist? Can she refuse to pay the $$500$ monthly fee? Why or why not?