a) Given your other assumptions, what market share is needed to ensure a total free cash ow (FCF) of $0 over years 1 to 5? (Note: FCF during a year equals after- tax prots plus depreciation minus xed costs, if any.) 1)) Explain how an increase in market share changes profit. c) Explain how an increase in market size growth changes prot. d) Use Excel's auditing tool to show how the market growth assumption inuences your spreadsheet