Your task is to write function ```findSum```.
Upto and including ```n```, this function will return the sum of all multiples of 3 and 5.
For example:
```findSum(5)``` should return 8 (3 + 5)
```findSum(10)``` should return 33 (3 + 5 + 6 + 9 + 10)
def find(n):
    sum = 0
    for i in range(1,n+1):
        if i % 3 == 0 or i % 5 == 0:
            sum += i
    return sum
def find(n):
    sum = 0
    for i in range(1,n+1):
        if i % 3 == 0 or i % 5 == 0:
            sum += i
    return sum