Two dimension in stacked bar chart

[yoganantha321]

Hi, I have used group by the fields year, month and date as drill down in single stacked bar chart.

Used the bucket field as different expression as below

and  average response time as another expression for line chart

and got the combo chart as (chart 1)

But my requirement is two dimension and two expression for stacked bar chart and two expression and chart as chart 2

but for my requirement the chart must be as chart 1 which can be clickable on the legends also

I have attached sample file with data any body can help me in this!!!

Regards,

Yoganantha Prakash G P