Write a MATLAB function that uses the resource grid as an input and identifies the following DMRS parameters.

$($a$)$ Start and length indicator variable

$($b$)$ DMRS Length

$($c$)$ DMRS Additional Positions

$($d$)$ Configuration Type

$($e$)$ CDM Group without Data

The resource grid contains PDSCH data and DMRS only, and the power level of DMRS is higher than that of the data.

Your code should work for all the possible DMRS configurations.