pset 1 fatal error: 'studio.h' file not found

Hi I am on pset1 and I seem to be missing studio.h. Could you tell me how to install studio.h?

Here is my program:

 #include <studio.h> int main(void) { printf("hello world!\n"); } 

Here is the error that I received:

 ~/workspace/pset1/ $ make hello clang -fsanitize=integer -fsanitize=undefined -ggdb3 -O0 -std=c11 -Wall -Werror -Wextra -Wno-sign-compare -Wshadow hello.c -lcrypt -lcs50 -lm -o hello hello.c:1:10: fatal error: 'studio.h' file not found