How to separate an alpha texture into 3 alpha textures

[Skywalker Scofield]

Hello,

i have bought on marketplace something i thought to make 3 separate beards but i had the surprise to receive one unique texture showing on the 3 beards on the same alpha transparent texture ! so it is impossible to apply it as a facial tattoo because the 3 beards are shown simultaneously and not at the appropriate place on the face :=). i am bad at gimp or like that, would someone help me and splittling the attached texture into 3 separate alpha textures so i can apply them for 3 different beards facial tattoes  ? i if necessary let me know inworld. thank you in advance. Skywalker Scofield