diff --git a/assignment-1a/ASSIGNMENT.md b/assignment-1a/ASSIGNMENT.md
index 97c9982..e83b6df 100644
--- a/assignment-1a/ASSIGNMENT.md
+++ b/assignment-1a/ASSIGNMENT.md
@@ -138,7 +138,7 @@ image size, to expedite the debugging process.
 
 To explore the effects of various scene parameters, you are advised to start by
 varying the values of just one viewing parameter at a time, such as: the eye
-position, the viewing direction, the direction of the ‘up’ vector, the vertical
+position, the viewing direction, the direction of the 'up' vector, the vertical
 field of view, the image aspect ratio, etc. Once you understand the effect of
 each parameter in isolation, you should experiment with combinations of changes,
 such as: co-varying the field of view and the proximity of the eye to the
@@ -164,7 +164,7 @@ cube.
   illustrate and explain your findings. In your writeup, be sure to specifically
   address each of these three points:
   - How does the apparent rotation of the scene with respect to the viewpoint
-    change with changes in the direction of the ‘up’ vector?
+    change with changes in the direction of the 'up' vector?
   - How do changes in the field of view settings affect the appearance of the
     scene in your rendered image?
   - How can the viewing parameters (e.g. the camera location, field of view