The Price of a zero -coupon bond (ZBC) that matures at time t = 10 and that face value 100

An n= 10 biomial model lattice model has the following parameters r(0,0) = 5% u=1.1 d =0.9 q = 1-q = 1/2

compute the price at forward contract at the same ZBC where forward contract matures at time = 4