#include &lt;iostream&gt;    #include &lt;vector&gt;    using namespace std;    int main &#40;&#41;    &#123;        vector&lt;int&gt; myvector;        myvector.push_back&#40;78&#41;;        myvector.push_back&#40;16&#41;;        myvector.front&#40;&#41; += myvector.back&#40;&#41;;        cout &lt;&lt; myvector.front&#40;&#41; &lt;&lt; '\n';        return 0;    &#125;
A. 78
B. 16
C. 94
D. None of the mentioned
Answer:A
#include &lt;iostream&gt;    #include &lt;vector&gt;    using namespace std;    int main &#40;&#41;    &#123;        vector&lt;int&gt; myvector;        myvector.push_back&#40;78&#41;;        myvector.push_back&#40;16&#41;;        myvector.front&#40;&#41; += myvector.back&#40;&#41;;        cout &lt;&lt; myvector.front&#40;&#41; &lt;&lt; '\n';        return 0;    &#125;
A. 78 B. 16 C. 94 D. None of the mentioned
Explanation:In this program, We added all the values in the vector by using front and back operation.