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... (Budget: ₹600 - ₹1500 INR, Jobs: AI Art Creation, AI Image Editing, Graphic Design, Illustration, Illustrator, Image Processing, Photoshop, Print Design)