The following minerals contain silver. Rank the minerals in order of percent silver from least to greatest: miersite, AgI; hessite, Ag2Te; empressite, AgTe; and cerargyite, AgCl.
1. AgTe < AgI < AgCl < Ag2Te
2. AgTe < AgI < Ag2Te < AgCl
3. Ag2Te < AgTe < AgI < AgCl
4. AgCl < Ag2Te < AgTe < AgI
5. AgI < AgCl < Ag2Te < AgTe