Suppose you have developed a bond portfolio using the bonds listed below $($per $$100$ par value$)$ reported. All the bonds make semi$-$annual coupon payments.

Bond

Coupon rate $(\%)$

Number of years

price

A

$7$

$4$

$115$

B

$6$

$3$

$82$

What is the yield to maturity of the above bond portfolio based on the cash flow yield?