When it fluctuates downward, the option value =0=HSd-B, Su=6.35* 1.05=6.6675, Sd=6.35*0.95=6.0325.
h = 0.2675/(6.6675-6.0325)= 0.42 13,PV(B)= 6.0325 * 0.42 13/ 1.0 1 = 2.5 163
c = 6.35 * 0.42 13-2.5 163 = 0. 159