What item should an Architect consider when designing a Delegated Authentication implementation?

Universal Containers (UC) is looking to purchase a third-party application as an Identity Provider. UC is looking to develop a business case for the purchase in general and has enlisted an Architect for advice. Which two capabilities of an Identity Provider should the Architect detail to help strengthen the business case?
Choose 2 answers

Universal containers wants to implement SAML SSO for their internal salesforce users using a third-party IDP. After some evaluation, UC decides not to set up my domain for their salesforce.org. How does that decision impact their SSO implementation?

Universal Containers is implementing Salesforce Identity to broker authentication from its enterprise single sign-on (SSO) solution through Salesforce to third party applications using SAML.
What rote does Salesforce Identity play in its relationship with the enterprise SSO system?

Which two capabilities does My Domain enable in the context of a SAML SSO configuration? Choose 2 answers