--- exercises/096_memory_allocation.zig	2023-11-21 14:55:33.805678390 +0100
+++ answers/096_memory_allocation.zig	2023-11-21 14:56:00.236163484 +0100
@@ -64,7 +64,7 @@
     const allocator = arena.allocator();
 
     // allocate memory for this array
-    const avg: []f64 = ???;
+    const avg: []f64 = try allocator.alloc(f64, arr.len);
 
     runningAverage(arr, avg);
     std.debug.print("Running Average: ", .{});