Week Number to Dates Conversion

HI Experts,

I have one scenario in my report as I am getting the week number from BEX based on my refresh data. Here i want to convert week number to days. Can you please suggest me how to convert week number to days.

Eg: If my week number is 02 then it need to display Jan 5, 2015 to Jan 11, 2015.

Is it possible in WEBI. If possible suggest me how to do. If not give me the alternate solution to my requirement.

Thanks

Anusha.P