⇣ irretb ⇣irr100etb00014irr500etb00068irr1000etb00135irr2000etb00271irr5000etb00677irr10000etb01355⇣ irretb ⇣irr1,00000etb135irr5,00000etb677irr10,00000etb1355irr25,00000etb3387irr50,00000etb6774irr100,00000etb13547