Lenovo A6000 Plus Original Stock ROM Android KitKat Version 4.4.4

Hi XDA Developers, I'm New To This Android Development Department. I'm Having Lenovo A6000 Plus, This Is My First Android Mobile, Now I Want To Root My Mobile, Recently I've Updated It To Lollipop Version 5.0.2, Before Rooting My Mobile I Want To Backup Original Stock ROM Of My Mobile, And I Need Android Version 4.4.4 Stock ROM For Lenovo A6000 Plus, If Anyone Having Please Post That Download Link Here, [or] Please Say How To Backup Original Stock ROM Of My Mobile Without Rooting?

Note: I Need KitKat Version Of Lenovo A6000 Plus. So Please Post It Here. Because I Hate Lollipop Update, Its Having Lots Of Bugs. SD Card Is Writable On Lollipop Version, And When I'm Hearing Songs Using Headset In MxPlayer I Can't Increase Volume Above 10, If I Increase The Volume, The MxPlayer Crashed And Closed. Its Irritating.... So I Need KitKat Version. Please Provide Here. :( :( Thank Y0u...

Finally I'm Asking These All:-
1) Original Stock ROM Of Lenovo A6000 Plus Android Version 4.4.4
2) How To Flash It?
3) How To Backup Original Stock ROM Of Lenovo A6000 Plus Without Root and With Root?
4) Reply For Above Mentioned Questions.

Thanks You Guyz... If Anyone Post A Solution For This Thread That Will Be Helpful To Others.