Apple data scientist IC 4 compensation

Hi folks! What is the general range of compensation for an IC 4 level, data scientist at Apple? I understand it would vary by experience, performance etc. But some range/ estimates would be really helpful! What does it look like for these components: 1. Base 2. Bonus 3. RSUs (over 4 years) 4. Sign on Does Apple have annual refresher? What’s the general value of it as percentage of base salary? Thank you very much for taking the time to provide inputs! Much appreciated as I try to figure this out.