Interview Course Based on Story Questions

# Problem statement 
For this challenge, you will be given a string, `s`. Your task will be to perform replacement operations in this string that replace substrings with new ones and return the resultant string. For the replacements, you will be given a list of `indices`, a list of strings called `sources`, and a list of strings called `targets`.
> The replacement should **only take place if** the `sources[i]` substring starts at the `indices[i]` position. The make the replacement, we have to replace `sources[i]` with `targets[i]` in the original string.

Note that the `sources[i]` and `targets[i]` substrings can have different lengths. Therefore, the resultant string can differ in length from the original string. 
## Input
The function will take four arguments: a string called `s`, an array of integers called `indices`, an array of strings called `sources`, and another array of strings called `targets`. Let's consider the following inputs:
```
s = "vmokgggqzp"
indices = [3,5,1]
sources = ["kg","ggq","mo"]
targets = ["s","so","bfr"]
```
## Output
The output of the function will be the string obtained after the replacements. The following is the output for the above-mentioned inputs:

```
"vbfrssozp"
```

# Coding exercise
Implement the `find_and_replace(s, indices, sources, targets)` function in the skeleton code given below:

DIY: Find and Replace in a String

Problem statement