please I need this one.

the optimal va Hhot thoo a finmilbtSoo, ooo 2) A mpony krows thet they must o in 2 s he vouation interest rate in ,-.01/ hcy want to immun ze ths portfa othepu chaef two zcra coupon bonds, with a matrdn ttre ofi2 ond 36 rorths. Fand +hc amnt each tnd to fully immunizc the oebt and conclu what pu pbaied in that pa foio alic they offer annually, a coupon (a teof .05% and on annuo lly yield rate of 3" 1. tssi -find the duarionof the anand erices of tre tods, according b modified duation and conventy, by varyng the amval yield rote to 5% if this bond is a s-year bond