Write a function cond_dup : 'a list -> ('a -> bool) -> 'a list that takes in a list and preciate and duplicates all elements which satisfy the condition expressed in the predicate. For example, cond_dup [3;4;5] (fun x -> x mod 2 = 1) = [3;3;4;5;5]. let rec cond_dup l f = (* YOUR CODE HERE *) raise (Failure "Not implemented") assert (cond_dup [3;4;5] (fun x -> x mod 2 = 1) = [3;3;4;5;5])

Write a program that prompts the user to input a string. the program then uses the function substr to remove all the vowels from the string. for example, if str = "there", then after removing all the vowels, str = "thr". after removing all the vowels, output the string. your program must contain a function to remove all the vowels and a function to determine whether a character is a vowel.

In cell b18, enter a formula to calculate the amount budgeted for meals. this amount is based on the daily meal allowance and the total travel days (# of nights+1).

Which set of steps will organize the data to only show foods with more than 100 calories and rank their sugar content from greatest to least?