A CFO is looking at how much the company is spending on computing.He samples companies in the pharmaceutical industry and develops the following stem-and-leaf graph. 
What would be the first class interval for the frequency histogram?
Definitions:
Credit Default Swaps
Financial derivative contracts that transfer the credit exposure of fixed income products between parties, used as a form of insurance against default on loans or bonds.
Interest Rate Risk
Interest rate risk is the potential for investment losses due to fluctuations in interest rates, affecting the value of fixed-income securities inversely.
Protection Sellers
Protection sellers in a financial context typically engage in credit derivatives markets, selling credit protection to hedge against the risk of default on underlying credit assets.
Protection Buyers
In derivatives trading, individuals or entities that purchase credit protection to hedge against potential losses from a credit event like default.
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