If a string is stored at the memory address 0x20008000 and the string is Cortex-M, show the memory content in hex format starting at 0x2000800. How many bytes does this string take in memory.

Write a C program that implements the standard function

Char * strrchr(const char *str, int c)

That returns the memory address of the last instance of c in the string str. Return a NULL pointer if c is not found in the string.