A bond with a face value of 1000 yuan with a coupon of 12% and a maturity of 5 years with a one-time payment of principal and interest (calculated on the simple interest method). Enterprise A purchases and holds the bonds at 1,050 yuan when they are issued; Enterprise B buys the bonds at 1,300 yuan at the beginning of the third year and holds them for three years; Enterprise C buys the bonds at 1,170 yuan at the beginning of the second year and sells them at 1,300 yuan after holding them for two years. Requirements (calculated by simple interest method):

(1) Calculate the final actual rate of return of Company A.

(2) Calculate the yield to maturity of Company B.

(3) Calculate the holding period yield of Company C.