help me to solv this please

Homework 1. What are the quotient and remainder when: -123 is divided by 19? 2. Find a divm and a mod when a=-10101,w=333. 3. Find the value of [(-133 mod 23 +261 mod 23) mod 23] 4. Find the hexadecimal expansion of (97644). 5. Add and product a = (111), and b = (101), use addition algorithm and multiplication algorithm? 6. Use the Euclidean algorithm to find god (123,277) and find an inverse of 123 modulo 277? 7. Solve the congruence 11x 25 (mod 60)? 8. Use the construction in the proof of the Chinese remainder theorem to find all solutions to the system of congruences x = 2 (mod 3), x = 1 (mod 4), and x=3 (mod 5)