The spot rate data is known as follows:

S0(1) = 5%, S0(2) = 5.25%, S0(3) = 5.55%, S0(4) = 6%.

You enter into an interest rate swap agreement for 4 years, with swap payments made at the end of the year. Notional amount of 1 million for the first year, and reduced by 200 thousand in subsequent years. You will pay a fixed rate and receive a floating rate of LIBOR. Calculate the fixed rate of this agreement.