Problem:
Question 1: How many unique decimal numbers can be formed with 7 digits?
Question 2: How many unique hexadecimal numbers can be formed with 7 bits?
Question 3: What is the range of unsigned decimal numbers that can be represented with 3 octal digits?
Question 4: What is the range of unsigned binary numbers that can be represented with 3 octal digits?
Please show your work in detail.