Challenge 1: Reading and Writing a Variable Through a Pointer — Possible Solution
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#include <stdio.h>

int main() {
    int value = 10;
    int *p = &value;

    printf("Through pointer: %d\n", *p);

    *p = 50;
    printf("Original variable: %d\n", value);

    return 0;
}

Output:

    Through pointer: 10
    Original variable: 50

WHY THIS WORKS AS AN ANSWER
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*p correctly reads value's current contents through the pointer
(dereferencing p), and *p = 50 writes through that same pointer back
into value's actual memory -- proven by printing value directly
afterward and seeing 50, not 10, confirming the pointer and the
original variable genuinely refer to the same memory location.