Interest coverage ratio not affected by the investment in associates?

Hi Guys. I am a bit confused with CFA book Reading 28 EOC question 8 (page 468). Is interest coverage ratio really not affected by the investment in associates? I decreased Colorfull Concept EBIT with 21 (20% share in Exotic Imports NI => 105*0.20). Can you let me know why is CFA not adjusting Colorfull’s EBITwhen exluding the investment in associates? Thanks in advance.

Equity method income is non-operating and therefore not included in EBIT.