I539 new edition form question for COS from H1B--> F2

[EswP]

I have downloaded the latest edition of Form I539 and in that Page 1- above Item # 11, 12,14a and 14b, it is mentioned as "Provide details about your recent entry Into the United States".

Question- When i entered last time to US, i was having my old passport. Here I gave my I94 number for Item 11, but for item 12,14a and 14b - Should i give my old passport details which was used while entering States and which will be used to retrieve my online I94 in the CBS website? and give the current passport information in Page 2-Part 4?

or

 Should i give my new passport details and and leave the current passport information in Page 2-Part 4 as blank?  

i-539.pdf