1. Number:
a. Fill in the bit pattern for the following 4-bit numbers. If there are multiple bit patterns for a number, write them all. 
If no bit pattern exists, write "N/A" in the box. DO NOT LEAVE IT BLANK!
PLEASE KEEP THE FORMAT OF THE FILE:
	|   Unsigned	|	Sign and Magnitude	|	One's complement	|	Two's complement	|
0	|		|				|				|				|
7	|		|				|				|				|
-1	|		|				|				|				|
15	|		|				|				|				|
8	|		|				|				|				|


b. In a system of ternary (Base 3) number, with n digits, how many number can be represented?
Answer:
c. For an n-digit signed 2's complement ternary number (n > 1), what is the number of positive integers?
Answer:   
d. For an n-digit signed 2's complement ternary number (n > 1), how many zeros are there?
Answer:
e. For a 4-digit signed 2's complement ternary number, what is the representation of -3?
Answer: