Q$1($a$)(6$ marks$)$

The function definition below is taken from Chapter $4$ and describes the general problem of finding the first

occurrence of a given character in a given string.

In $[1]$:

$\%\%$javascript

var head$=$document.getElementsByTagName$(\text{'}$head$\text{'})[0],$style $=$ document.createElement$(\text{'}$style$\text{'}),$

Function: first index $\backslash$ Inputs: text, a string; character, a string $\backslash$ Preconditions: $|$character$|=1\backslash$ Output: index,

an integer $\backslash$ Postconditions: if character occurs in text, index is the smallest integer such that text$[$index$]=$

character, otherwise index $=|$text$|$

Write a function defintion that finds the second occurrence of any vowel in a given string. If a second vowel is

not found, the function should indicate this by returning the length of the string. The vowels do not need to be

the same letter or the same case $($i$.$e$.$ uppercase or lowercase$).$

Examples: $\backslash$ In the string 'Hello', the first occurrence of any vowel is $\text{'}$e$\text{'},$ the second occurrence of any vowel is

$\text{'}$o$\text{'},$ so the function would return $4.\backslash$ In the string $\text{'}$Hi$\text{'},$ there is no second occurence of any vowel, so the function

would return $2.$

Write your answer here

Function: $\backslash$ Inputs: $\backslash$ Preconditions: $\backslash$ Output: $\backslash$ Postconditions: