PLEASE SOLVE USING excel and showing the formulas.

Taussig Corp.'s bonds currently sell for $1,150. They have a 6.35% annual coupon rate and a 20-year maturity, but they can be called in 5 years at $1,067.50. Assume that no costs other than the call premium would be incurred to call and refund the bonds, and also assume that the yield curve is horizontal, with rates expected to remain at current levels on into the future. Calculate the yield to maturity (YTM= rD) and the yield to call (YTC). Under these conditions, what rate of return should an investor expect to earn if he or she purchases these bonds?