Write a function called fence that takes two scalar inputs: lng, the length of a straight fence we need to build and seg, the length of one segment of fencing material. A segment needs to have a pole at both ends, but two neighboring segments always share a pole. The function returns two scalar outputs: the number of segments we need for the given length of fence and the number of poles needed. Note that a segment can be cut shorter if needed. For example, to build a 75m long straight fence using 10m segments, we need 8 segments. You may find the ceil built-in function handy.