Description: Given a non-negative integer num represented as a string, remove k digits from the number so that the new number is the smallest possible.

Please write a program in Python code for the following      John is taking n courses this semester, numbered from 1 to n.Each of these courses has a final exam. These examsare all held on the same day. John has d days left to study for the exams. In each of these days,he has exactly h hours of free time he can use to study (note thath might be greater than 24 as John lives in a different universe witha different time system). Moreover, for the i-th course John is taking,he has a learning rate l[i] indicating the number of marks he getson the exam per hour of studying for that course.John studies for his exams in 1 hour blocks; for example,he can't study for an exam for 40 minutes then switch to another one. Note that in John's universe, final exam grades aren'tcapped at 100. In fact, there's no upper limit on how high they can go. If John takes an exam without studying for it, he'll get a 0 on that exam. In order to qualify for a nice scholarship, John needsto get at least m marks on…

Implement a function alterCase in Python that converts a word to "alterCase". Given a word, using any mix of upper and lower case letters, the function then returns the same word, except that the first letter is upper case, the second is lower case, and then cases of letters alternate throughout the rest of the word. >>> alterCase('apple')'ApPlE'

Write a program in Python that asks the user to input an integer and print two integers, root and power, such that 1 < power < 6 and root ** power is equal to the integer entered by the user. If no such pair of integers exists, it should print a message to that effect.