Explain how the bankruptcy of Lehman Brothers (a large securities firm) reduced the liquidity of the commercial paper market.

I want you to answer two questions each in one page, the book I am studying is

FINANCIAL MARKETS AND INSTITUTIONS 10TH E.

the first question is:-
17. Impact of Lehman Brothers Failure. Explain how the bankruptcy of Lehman Brothers
(a large securities firm) reduced the liquidity of the commercial paper market.

second question is:- Go to https:// research.stlouisfed.org/fred2. Under categories,� select �interest
rates.� Compare the yield offered on a T-bill with the yield offered by another money market security
with a similar maturity. What is the difference in yields? Why do you think the yields differ?