Oracle 10g-SQL Fundamentals

Please help or advise. I am busy try to study and do my 2nd assignment. My challange is I have just noticed that my official book that I purchased from UNisa gets to lesson 4 Lesson 4 Reporting Aggregated Data using functions and just repeats itself. Does anyone have a number I can phone and get this sorted out

I don't know how helpful this will be, but this is the footer off of the email correspondance that they LOVE to send me... - LRMG is the company that I had to buy the book through.

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Nala Mlangeni
Unisasupport

Tel: +27 87 942 ???? | Fax: +27 87 942 2098/9 | Cell: +27 713838552
Email: unisasupport@lr.co.za
Website: http://www.lrmg.co.za

Division:Learn Solution, a division of The LR Management Group (Pty) Ltd
The LR Management Group has a certified A rating as a Level 3 Contributor to BBBEE

Johannesburg: Tel: +27 87 941 5764 | Fax: +27 87 942 2098/9
International callers: +27 10 590 5764
Block B – Unit A, 3rd Floor, 34 Whiteley Road, Melrose Arch, 2196
PO Box 98, The Woodlands, 2080

Cape Town: Tel: +27 21 448 6660 | Fax: +27 21 448 6377
Park Building, Black River Park, 1 Fir Street, Observatory, 7925
PO Box 13095, Mowbray, 7705

Thanks a million, the information helped me a lot