2. Find m mod n where m and n are:

(a) m = 28, n = 6

(b) m = 28, n = 6

(c) m = 6, n = 28

(d) m = 3787, n = 377.

Your answers should be elements of Zn.

4. List the units and the zero divisors in Z10.

6. Use the extended Euclidean algorithm as presented in lectures to nd:

(a) g := gcd(90,48);

(b) Integers x and y such that 48x + 90y = g.

I'm learning discrete math for this semester,and the above questions are from my tutorial session. Because the final examination is in next month, help some one can help me to understand these questions.