Translation of "Calmly" in Arabic

Very calmly, clearly,

بتروي شديد، وبتركيز،

And he would usually smile and very calmly say,

وعادة ما كان يبتسم ويقول بكل هدوء،

He calmly walked over to the bench subbed his player

مشى بكل هدوء للإمام إلى لاعبه عند مقاعد البدلاء