5) Phosphor bress is an alloy of 10wt%3n90wt% Cy. Please consult the Cu-Sn binary phase diagram shown below. Suppose you were-to solidffy a long fod of this allioy from ne end. A Assrne : i) The 'solledIlquid interface is flat (no dendrites are ptesent) and II) there is complete mixing in the liquild ( Ke=Kg Assume also that k0 between and lquid is a constant equal to 0.36 and that k0 between and liquid is constant at 0.87. Now calculate: a) The fraction of the rod that freezes directly from the 1 liquid as pure phase. b) The fraction of the rod that freezes directly from. the llquid as puri. . phasse (24 points)