please explain its all one question

Q8 to 216 are based on the following information: You are leading a team on a M&A deal. Suddenly your analyst has disappeared and you have the following unfinished spreadsheet. The acquirer and the target are assumed to have zero growth. Tax rate is 40%. Now it is up to you to finish this job. Acquirer Target Combined Sales 400 100 500 200 60 260 Operating Expenses Annual cost savings 20 EBIT 200 40 ?1? EBIT(1-t) 120 24 ??? 40 30 ??? IS 30 30 ??? Depreciation Gross Plant & Equipment Change in Working Capital Free Cash Flow to Firm 10 5 ??? 9 120 19 ?2? Discount rate 8100% 9% 896 Firm Value 1500 211.111 73? 400 50 Long term debt 450 Equity value 1100 161.111 74? 8. Please fill in the numbers. What is ?1? QUESTION 9 9. What is ?2? QUESTION 10 10. What is ?3? QUESTION 11 11. What is ?4? QUESTION 12 12. What is the synergy of this merger