According to the article, what mistakes did the CEO of Telcorp make?

Question 71 - 73 refer to following paragraph:
Security Inc. is the most trusted name in the sales and service of financial equipment and automated teller machines. Offering a degree of personal yet professional service that is unrivaled in the financial industry today, all employees at Security Inc. are (71) ........ product lines or tailor a financial equipment service program to (72) ........ your specific business needs.
We offer the widest array of financial equipment products, services and supplies. This diversity in product and service offerings, combined with our unrivaled knowledge in the sale and service of automated teller machines, provides a (73) ........edge and real value for our customers.

You can reach us either by phone or e-mail when you need technical -------- or have any questions about the product you purchased.

Make sure you provide the requested -------- when submitting advertising proposals since incomplete ones will not be accepted

The company announced plans to -------- its corporate name to BATEL, Inc. for marketing and commercial purposes.

If you plan to rent equipment, delivery and collection times, plus insurance coverage for any damage should all be dealt with -------- advance.

Thank you for offering me a position with the company I wish to work for, and I really appreciate the efforts you’ve made on -------- behalf.