⇣ irretb ⇣irr100etb00014irr500etb00068irr1000etb00136irr2000etb00272irr5000etb00681irr10000etb01362⇣ irretb ⇣irr1,00000etb136irr5,00000etb681irr10,00000etb1362irr25,00000etb3404irr50,00000etb6809irr100,00000etb13618