what traits of chaucer's humour and irony do you find in the prologue? comment on any two contrasting portraits in the prologue?

As you mentioned, this is a very involved question that is too large for this forum to handle properly. I'm providing a link to an article that might be of some help,

http://www.scribd.com/doc/24940469/Geoffrey-Chaucer-s-Prologue-to-the-Canterburry-Tales-A-Critical-Analysis-by-Qaisar-Iqbal-Janjua