Answer:
the yield curve will be the average between the different percentage of the bonds yield:
Year 1: that is simple the same as the fgiven rate 4%
Year 2: we do the average among the two years:
4% + 5% = 9% in two year average per year 4.5%
Year 3: we procedd the same as before:
4% + 5% + 6% =15% in three years
the average will be of 5%
Step-by-step explanation: