Simulated observations of the System 3 at z = 3.98 lensed by Abell 2744, using the HST ACS filters F435W, F606W, and F814W; the HST WFC3/IR filters F105W, F125W, and F160W; and the JWST NIRCam filters F115W, F150W, F200W, F277W, F356W, and F444W. Each panel uses its own flux range to optimize visibility of the source structure. The typical background level and exposure time for each filter are listed in Table 3. Further details, including the S/N analysis of the clump marked with a blue circle, are reported in the text. are reported in the text. The white squares in the bottom left corner of every panel show how the source galaxy appears when the gravitational lensing effect is not included. The unlensed and lensed sources are represented using the same pixel scale.