Upscale AI Image for Standee

I have a single AI-generated image containing both visual elements and text that I must blow up to fit a 5-ft-tall by 2-ft-wide standee. Unfortunately, I only have the flattened JPG/PNG—no layered or vector source—and I’m not sure of its current DPI. Your task is to work with that flat file, cleanly upscale it, and deliver a print-ready version that will hold sharp edges and legible text at full size with zero pixelation or color banding. I expect a final file suitable for a large-format printer (TIFF, high-quality PDF, or PNG) at a professional print resolution appropriate for a standee. Please let me know the workflow you prefer for enlarging mixed-content artwork (e.g., AI-assisted upscaling, vector re-creation, manual redrawing) and what you’ll need from me to get started. A quick turnaround would be ideal, and I’m happy to test a proof section before you complete the entire image.