fixing broken links

group.html

@@ -159,7 +159,7 @@ <h3><a href="https://taveeshsharma.com/">Taveesh Sharma</a><br />
 			</div>
 
             <div class="col-lg-4 col-sm-6 text-center mb-4">
-				<img class="img-responsive img-fluid d-block mx-auto" src="images/uchicago.png" alt="">
+				<img class="img-responsive img-fluid d-block mx-auto" src="photos/tara.jpg" alt="">
                 <h3><a href="">Tara Tandel</a><br />
 					<small>Ph.D. Student</small>
 				</h3>
@@ -168,7 +168,7 @@ <h3><a href="">Tara Tandel</a><br />
 
 
             <div class="col-lg-4 col-sm-6 text-center mb-4">
-				<img class="img-responsive img-fluid d-block mx-auto" src="images/uchicago.png" alt="">
+				<img class="img-responsive img-fluid d-block mx-auto" src="photos/van.jpg" alt="">
                 <h3><a href="https://cs.uchicago.edu/people/van-tran/">Van Tran</a><br />
 					<small>Ph.D. Student</small>
 				</h3>
@@ -371,7 +371,7 @@ <h4><a href="https://saxon.harris.uchicago.edu/">Jamie Saxon</a><br /> <small>Ma
 
 			<div class="col-lg-2 col-sm-6 text-center mb-4">
 				<img class="img-responsive img-fluid d-block mx-auto" src="photos/paul.jpg" alt="">
-                <h4><a href="https://www.cs.princeton.edu/~pschmitt/">Paul Schmitt</a><br />
+                <h4><a href="https://pschmitt.net/">Paul Schmitt</a><br />
 					<small>University of Hawaii</small>
 				</h4>
 				<small><p>2017-2020</p></small>
@@ -396,7 +396,7 @@ <h4><a href="https://ensa.fi/">Roya Ensafi</a><br />
 
 			<div class="col-lg-2 col-sm-6 text-center mb-4">
 				<img class="img-responsive img-fluid d-block mx-auto" src="photos/danny.jpg" alt="">
-                <h4><a href="https://www.cs.princeton.edu/~yuxingh">Danny Huang</a><br />
+                <h4><a href="https://hdanny.org/">Danny Huang</a><br />
 					<small>NYU</small>
 				</h4>
 				<small><p>2017-2020</p></small>