Random problems to practice

1. • Evaluate whether the string is a palindrome or not.
2. • Calculate and print the sum of the elements in an array, keeping in mind that some of those integers may be quite large. (Yay one liners)
3. • Given an array of integers, calculate the fractions of its elements that are positive, negative, and are zeros. Print the decimal value of each fraction on a new line.
4. • Return the total number of highest values within the array.
5. • Time conversion. Given a time in 12-hour AM/PM format, convert it to military (24-hour) time.