Hello everyone
I have a question on earth sun system

Q. If the size of the sun is reduced to 9/10 its present size

1. By what factor will gravitational force vary?lease show the
required calculations.

2. What will be the changes on the orbit, semi-major axis, period
velocity etc of the earth?

3. What changes will the sun experience?

Thank u. expecting similar response.

with regards,
astro_vedant