Implement the Robot blocks world problem discussed in the class in THREE 
ways and compare and contrast pros and cons. The three ways are:
1. A* based
2. Prolg based
3. HMM based

Make sure you are clear about the STATE SPACE. Draw all the 22 states in a 
big piece of paper (poster?). Then carefully construct the aotumaton. Do 
not take this step lightly. Many basic ideas will come from this detailed 
exercise.