<prompt> Translate the following text to EnglishUsimamizi wa juu lazima uwe na kujitolea kabisa kwa maneno na vitendo kubadilisha utamaduni, na kujitolea hii lazima kudumu na kuonyeshwa kwa wafanyikazi.  <response>: Top management must be totally committed in both words and actions to changing the culture, and this commitment must be sustained and demonstrated to staff. 