How can I gray out some check boxes input table?

Player Looking for a Team

How can I gray out in the input table 

Tri Level-  just keep the check box for the 18+ and gray out the other age groups in that row.

Thanks for your help!!

Inject the following custom CSS codes to your form:

input#input_4_2_1, input#input_4_2_2, input#input_4_2_3, input#input_4_2_4 {

    pointer-events: none;

    display: none;

}

The pointer-events is to disable the selection. The display-none is to hide the checkbox. 

To inject, follow the steps here: https://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes. 

Thank you so much for your assistance.  It worked great and my husband was able to figure out to gray out other check boxes too.

V