(Describing a simple world) Open Boole's World. Start a new sentence file, named Sen- tences 3.20, where you will describe some features of this world. Check each of your sentences to see that it is indeed a sentence and that it is true in this world. 1. Notice that f (the large dodecahedron in the back) is not in front of a. Use your first sentence to say this. 2. Notice that f is to the right of a and to the left of b. Use your second sentence to say this. 3. Use your third sentence to say that f is either in back of or smaller than a. 4. Express the fact that both e and d are between c and a. 5. Note that neither e nor d is larger than c. Use your fifth sentence to say this. 6. Notice that e is neither larger than nor smaller than d. Use your sixth sentence to say this. 7. Notice that c is smaller than a but larger than e. State this fact. 8. Note that c is in front of f; moreover, it is smaller than f. Use your eighth sentence to state these things. 9. Notice that b is in the same row as a but is not in the same column as f. Use your ninth sentence to express this fact. 10. Notice that e is not in the same column as either c or d. Use your tenth sentence to state this