Part 3 (45 marks] {a} Extract for each week, the yield of the 26-week Treasury bill (or equivalently the 90 dag;r or ISO-day bank accepted bill from the nancial media (Le. Federal Reserve Bank: http:#www.federalreservegovfdefaulthon) over your sample period. {Remember sometimes reported yields are usually annualised gures. Convert the yields to weekly numbers. Use these as a proxy for the risk free rate)