Decay of Sodium-22 Isotope

A sodium-22 (Na-22) isotope is a radioisotope that undergoes beta decay with a half-life of approximately 2.6 years. In this process, a sodium-22 nucleus emits a beta particle (an electron) and transforms into a stable neon-22 (Ne-22) nucleus. One day, a researcher quantifies the amount of sodium-22 left after a period of observation. If the initial amount of sodium-22 present was 160 grams, how much sodium-22 would remain after 10.4 years?