已知 semi annual compounded yield to maturity

Treasury bills:  yield to maturity (ytm)

1month        1.2%

3month      1.65%

6month      2.1%

1year     2.25%

Treasury notes  ytm

2year               2.55%

3year              2.8%

5year             3%

要求区间 t=(0,1,1.5...4.5,5.0)的US treasury zero rate curve和forward rate curve.

用matlab怎么求解？