Given that 1,3-butadiene has a uv absorption of 217nm, predict the approximate absorption for the conjugated system in vitamin D3. 
Definitions:
Summarize Benefits
Involves condensing key advantages or positive aspects of a product, service, or situation into a brief, clear presentation.
Buyer's Needs
The requirements or demands of a consumer that influence their purchasing decisions, including functionality, price, convenience, and status.
Assumptive Close
A sales technique where the salesperson assumes the customer has decided to make a purchase and proceeds with steps to finalize the sale, often leading to a sense of inevitability about the transaction.
Long-Term Customers
Clients or buyers who have been purchasing products or services from a business for an extended period, showing loyalty.
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