3. How would one write 910 in unary (base one)? 4. Write out the following numbers in terms of powers of 2. Omit the powers of 2 that are not present. For example, 431o would be written as: (1 25) + (1 23) + (1 >x 21) + (1 20) a) 32 b) 15 c) 65 d) 10