Challenge 2: Three auto Variables and Their Deduced Types — Possible Solution
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#include <iostream>

int main() {
    auto count = 5;          // deduced as int
    auto price = 19.99;      // deduced as double
    auto name = "Alice";     // deduced as const char*

    std::cout << count << std::endl; // int
    std::cout << price << std::endl; // double
    std::cout << name << std::endl;  // const char*

    return 0;
}

Output:

    5
    19.99
    Alice

Deduced types, by initializer:
- count: auto deduces int, because 5 is an integer literal with no
  decimal point or suffix.
- price: auto deduces double, because 19.99 is a floating-point
  literal, and C++'s default floating-point literal type is double
  (not float).
- name: auto deduces const char*, because "Alice" is a string literal,
  which in C++ has type const char[6] that decays to const char* in
  this context -- the same array-to-pointer decay behavior the site's
  own C course covered for arrays generally.

WHY THIS WORKS AS AN ANSWER
------------------------------
Each variable's deduced type is stated explicitly and justified by the
specific literal form used to initialize it (integer literal, decimal
literal, string literal), rather than just asserting "auto figures it
out" -- showing genuine understanding of how auto's deduction rule
actually reads each initializer's own type.