Computing, Analyzing and Interpreting Residual Operating Income $($ROPI$)$

In its annual report for the fiscal year ended July $27,2019,$ Cisco Systems reports the following $($$ million$)$:

July $27,2019$Net operating profit after tax $($NOPAT$)$$$11,346$Net operating assets $($NOA$)$ beginning$$22,225$

Assuming the following weighted average cost of capital $($WACC$),$ what is Cisco's residual operating income $($ROPI$)$ for the fiscal year ended July $27,2019?$

WACC$7\mathrm{.}6\%$

ROPIAnswer $1$

b$.$ At what level of WACC would Cisco not report positive residual operating income for the year?

WACCAnswer $2$