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AWR1642BOOST: Print velocity info in ROS for AWR1843BOOST

Part Number: AWR1642BOOST

I'm using aAWWR1843BOOST EVM device with mmwave sdk 3.1

I'm trying to print the velocity, x, y, z coordinates and intensity for every point detected.

When i tried to use the ROS_INFO for velocity, it's throwing up the following error.

Can you please guide me to print all the info i mentioned in a single line for every detected point.

Also, from the data that i see on the with ROS_INFO command of x,y and z coordinates, i' m confused that are these the coordinates of the points that i see in rviz or these are the coordinates which i'm getting after some post processing on the points seen in the rviz, because i see more number of points in the rviz than the one printed in the terminal. I have attached a screenshot of the same.