I am struggling with the following parts of my assignment. Can someone give a help, please? Thanks

(a) The performance of staff is rated as excellent, satisfactory, pass or fail during the evaluation pe- riod. Suppose the staff can be categorized as technical staff and administrative staff. A random sample of 1000 staff were selected with their performance evaluation tabulated below. excellent satisfactory pass fail technical staff 50 250 200 30 adminstrative staff 60 200 200 10 Test whether there is an association between the category of staff and their performance evalu- ation at 1% level of significance. (6marks](c) "I-Phonie" Company surveyed 1000 of their phone customers and asked them what is their favourite colours for their phone. The colours chosen by their customers surveyed are represented below: Color black white red blue green yellow pink grey Customers 100 150 200 50 100 80 140 180 At 1% level of significance, is there any evidence indicating that there are some colours which are more favourable? [4 marks]