#### Question

Given *GM* and radius *r* of Earth, take an array *arr* and return a new array where each item has corresponding key *orbitalPeriod* and its value pair. The value should be rounded to the nearest number.

#### References

- https://www.toppr.com/guides/physics-formulas/orbital-velocity-formula/
- https://en.wikipedia.org/wiki/Orbital_period

#### Examples

`orbitalPeriod([{name : "sputnik", avgAlt : 35873.5553 …`