Please prove the detailly answer for all the question blew, thank you very much.

1. List the five types of users identified in a database system and describe their individual interactions with database systems.

2. Consider the File Structure for the ABC Company Project Management data given below. Then, respond to each of the following questions related to the structure.

ProjectNum	ProjectName	EmpNum	EmpName	JobCode	Job_Chg_Hour	Proj_Hours	Emp_Phone
1001	Thunder	121	Daisy B. Burns	AB	80.00	14.2	773-555-1216
1001	Thunder	217	Alice M. Zane	CD	65.00	15.7	773-555-1216
1002	Chicago	821	Dean P. Pence	BD	95.00	14.4	773-555-1231
1002	Chicago	219	Cecily D. Worth	CD	80.00	17.2	773-555-1217
1003	Archimedes	222	Sami A. Allen	EH	65.00	24.9	773-555-8821
1003	Archimedes	121	Cecily D. Worth	AB	95.00	37.8	773-555-1219
1003	Archimedes	516	Denny T. Li	HW	80.00	22.2	773-555-2222
1004	Emerald	355	Danny T. Li	UG	65.00	19.7	773-555-2222
1005	Diamond	217	Alice M. Zane	CD	80.00	19.5	773-555-1216
1005	Diamond	222	Sami A. Allen	BD	95.00	22.3	773-555-8821

(a) List and discuss two additional fields that could or should appear on the above table structure.

(b) Identify and discuss the serious data redundancy problems exhibited by the file structure shown in the given data sheet.