fixed typos in lec4 - still have to expand on lec4 instructions and details

cst363/lec/lec4.md

@@ -3,8 +3,8 @@
 
 ## Lab*
 
-This lecture has some lab questions in the `lec/` dircory named `table1.pdf` *and* some example data called `patients.sql`
-Intro to some sql commands
+This lecture has some lab questions in the `lab/` dircory named `table1.pdf` *and* some example data called `patients.sql`. 
+`table1.pdf` will have some exercises to learn the basic commands of sqlite and `patients.sql` should have some example data which _table1_ asks you to query.
 
 ## Serverless