Can someone help me with 4 and 5 and explain.

APP. A PROBLEMS 679 PROBLEMS 1. Convert the following numbers to binary: 1984, 4000, 8192 2. What is 1001101001 (binary) in decimal? In octal? In hexadecima? 3. Which of the following are valid hexadecimal numbers? BED CAB. DEAD DECADE, ACCEDED, BAG, DAD 4. Express the decimal number 100 in all radices from 2 to 9. y different positive integers can be expressed in k digits using radix m bers? 6. Most people can only count to 10 on t ists can do and finger hands? With both hands and better. If you regard each finger as one binary bit, with finger extended as touching palm as 0, how high can you count using bo both feet? Now use both hands and both feet, with sien bit for two's complement numbers What is the range of expressible aumbers? orn the following calculations on &-bit two's 1110111 00101101 o1101III 8. Repeat the calculation of the preceding problem but now in one's complement 9. Cousider the following addition problems f for 3 -bit binary numbers in two's comple ment For each sum, state a. Whether the sign bit of the result is ) b. Whether the Tow-order 3 bits are 0 e whether an overflow occurred. too 1o. Signed decimat nunbets consising ol'x digits can be represented in digits with- out a signPositive oumbers have O as the leftmost digit. Negative numbers are formed by subtracting ench digit from Thus the negative of 014725 is 985274 Such nimbers are called nine's complement mumbers and are anaogous to one plement binary numbers, Express the fllowing as threerdirit bers: 6, 2, 100, 14t, 0