@@ -182,9 +182,13 @@ Exercises Needed: 13, 15, 17, 19, 21, 23, 25, 27, 29, 31
182182<img src =" ./resources/images/icons8-complete-26.png " alt =" complete-check-img " />
183183</li ><br >
184184 <li><a href="https://github.com/HarryDulaney/intro-to-java-programming/tree/master/ch_20"><strong>Chapter 20
185- </strong ></a > - Lists, Stacks, Queues, and Priority Queues</li ><br >
185+ </strong ></a > - Lists, Stacks, Queues, and Priority Queues
186+ <img src =" ./resources/images/icons8-complete-26.png " alt =" complete-check-img " />
187+ </li ><br >
186188 <li><a href="https://github.com/HarryDulaney/intro-to-java-programming/tree/master/ch_21"><strong>Chapter 21
187- </strong ></a > - Sets and Maps</li ><br >
189+ </strong ></a > - Sets and Maps
190+ <img src =" ./resources/images/icons8-complete-26.png " alt =" complete-check-img " />
191+ </li ><br >
188192 <li><a href="https://github.com/HarryDulaney/intro-to-java-programming/tree/master/ch_22"><strong>Chapter 22
189193</strong ></a > - Developing Efficient Algorithms</li ><br >
190194 <li ><a href =" https://github.com/HarryDulaney/intro-to-java-programming/tree/master/ch_23 " ><strong >Chapter 23
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