⇣ irretb ⇣irr100etb00014irr500etb00068irr1000etb00136irr2000etb00271irr5000etb00678irr10000etb01356⇣ irretb ⇣irr1,00000etb136irr5,00000etb678irr10,00000etb1356irr25,00000etb3391irr50,00000etb6781irr100,00000etb13563