Below mentioned condition formula

Hello,

I have data A1:C5
B2, B4 filled with a name APR , I want a names in C column with respect B column, in B column which are blank that should be filled in C column like:-B2&B4 filled with APR Now I want C1 ,C3,C5 should be filled with a APR


Please suggest some formula for above problem
Thank you.