How to convert week to Period

Hello All,

I have a requirement in BW to convert the value into 0FISCPER, 0FISCYEAR and 0FISCPER3, do we have any standard FM to meet that requirement.

Ex:

Source data: Week 52 FY18, this we have to convert and get 0FISCPER, 0FISCYEAR and 0FISCPER3.

Please provide your suggestions and thanks in advance for your help.

Regards,

DRKR.