I am creating a latex project with the document class ieeeconf:
\documentclass[letterpaper, 10 pt, conference]{ieeeconf}
I need to include some a figure with some subfigures, similar to what is shown in this article on positioning images (i.e. a figure with multiple subfigure images that each get there own caption numbering a,b,etc.) and another caption for the entire image:

However, since I ham using the ieeeconf documentclass, I get warning errors if I try to use either the subcaption package (as recommended in the link above) or the subfig package (as I saw recommended elsewhere).
What is the correct package to use here?

\usepackage[caption=false]{subfig}a try. (caption=falseis the important part.) – Jan 06 '20 at 21:48\hobx'), typeI' and the correct spelling (e.g., `I\hbox'). Otherwise just continue, and I'll forget about whatever was undefined.) – Ariella Jan 06 '20 at 22:19