If a radio button is selected from a group, check off the following check boxs

completely new at this, and although I am reading the JS Developers guide, I will not have enough time to complete this project without some help.

there is a Group named Contract Type with 5 Radio Button choices on page 1. When one of these Radio Buttons is selected, it would need to auto check a number of Check boxes on page 2. Each CB has it's own unique name. Using X Pro.

IE: RB1 - Check CB1, CB2, CB4

      RB2 - Check CB2, CB3, CB4, CB5

      RB3 - Check CB1, CB2, CB3, CB4, CB5

etc.

Can someone help with the code?