array formulas - Find four adjacent empty cells in Excel -


i have problem finding empty cells in table. want find empty parts of table (empty part - 4 or more empty cells in row).

table: 

+------+------+------+------+------+------+------+------+------+------+ | name | day1 | day2 | day3 | day4 | day5 | day6 | day7 | day8 | day9 | +------+------+------+------+------+------+------+------+------+------+ |    |    1 |    8 |    2 |    7 |      |    8 |    4 |      |    1 | | b    |    2 |    8 |    4 |      |      |      |      |    5 |    7 | | c    |    2 |      |    6 |    7 |      |    8 |    9 |    7 |      | | d    |    4 |      |      |      |      |      |      |      |    8 | +------+------+------+------+------+------+------+------+------+------+

the answer example should this: 

b empty day4 - day7   d empty day2 - day8

i guess need use array formula, not have experience that...

i appreciate or comments.
thanks!

assuming headers in a1:j1 , data in b3:j3. check each row itself, formula this:

=if(min(len(b3:g3&c3:h3&d3:i3&e3:j3)),"",index(b$1:g$1,1,match(0,len(b3:g3&c3:h3&d3:i3&e3:j3),0))&" - "&index(b$1:j$1,1,match(1,(index(b3:g3,1,match(0,len(b3:g3&c3:h3&d3:i3&e3:j3),0)):i3="")*(index(b3:g3,1,match(0,len(b3:g3&c3:h3&d3:i3&e3:j3),0)+1):j3<>""),0)+match(0,len(b3:g3&c3:h3&d3:i3&e3:j3),0)-1))

would do.

this array formula , must confirmed ctrl+shift+enter!

after can auto fill down formula. , show each row (if 4+ cells in row empty) headers of first , last empty cell of range. cells not need blank (empty stings work).

to automatically collapse have output want it, need array array formula again (which not possible parts , consume lots of resources.

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