# Thus df3 ds2 and p1 p11 p142 and df10 and every

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Thus, DF3, DS2, and P1, P1.1, P1.4.2, and DF10 (and every similarly “named” component of the DFDs) are CORRECT, and NOT the “formatting” error. Also note that you can assume that the depiction of DF7 in Level 1 is correct What you might think is a “logical error” that isn’t: Note that the source E1 and sink E2 are not on the lower level DFDs. That is OK. Look at Level 0. Yes E1 could be at Level 1 (it’s OK if it’s not), but since Level 1 is an explosion of P1, and sink E2 leaves P2 and P3, E2 could never be on Level 1 (or Level 2, for that matter). And since Level 2 is an explosion of P1.4, neither E1 or E2 could be on that level. .
Fill in the table Formatting Error is: Logical Error 1 is: Logical Error 2 is: Logical Error 3 is: 3
WBIT 3110, Unit 3 HW B FROM TEXTBOOK APPENDIX 7A 4. Corresponding to Problem and Exercise 1, on page 234. Draw a use-case diagram for the situation described in Problem and Exercise 9, page 214, at the end of the main body of Chapter 7. You may use the drawing tool in Word, or, if you have access to MS Visio, you may use that and either upload a separate Visio document, or copy that diagram from Visio into this document. This question is worth 15% of the assignment. 4
WBIT 3110, Unit 3 HW B FROM TEXTBOOK CHAPTER 8 5. Corresponding to Problem and Exercise 13 on page 288. A concert ticket reservation is an association among a patron, a concert, and a seat. Select a few pertinent attributes for each of these entity types and represent a reservation in an E-R Diagram. This question is worth 20% of the assignment. Each entity, and it’s corresponding relation or relations, are worth 4%. Or, if you can’t do either of the above, then you can write a short written explanation, for