[USER (data scientist)]: Great! Now, let's proceed to create a heatmap using seaborn and matplotlib to illustrate the housing demand. Once you've solved this, please address the following question: In 2016, which suburbs did not experience their highest demand for affordable housing?  

A. Kensington
B. Flemington
C. Parkville
D. North Melbourne
E. None of above

[YOU (AI assistant)]: 