Could you point how to configure this Bootstrap buttons to be correctly distributed accordingly with this layout?

<div class='row'>

      <div class="panel panel-primary">
      
          <div class='row'>
          
            <div class='col-md-8 pull-right'>
              <div class="btn-group" role="group">
                <button type="button" class="btn btn-primary" onclick="hotsite.vitrine.novo();">
                  <i class="fas fa-video" aria-hidden="true"></i> Minhas Fotos
                </button>
              </div>
            </div>
            
            <div class='col-md-6 pull-right'>
              <div class="btn-group" role="group">
                <button type="button" class="btn btn-primary" onclick="hotsite.vitrine.novo();">
                  <i class="fas fa-video" aria-hidden="true"></i> Todas as Fotos
                </button>
              </div>
            </div>
              
            <div class='col-md-4 pull-right'>
              <div class="btn-group" role="group">
                <button type="button" class="btn btn-primary" onclick="hotsite.vitrine.novo();">
                  <i class="fas fa-video" aria-hidden="true"></i> Enviar Foto
                </button>
              </div>
            </div>
              
          </div>  
       
    </div>
</div>