Ageing the Population...

Given a dictionary of people and their ages, return how old the people would be after n years have passed. Use the absolute value of n.

Examples

after_n_years({
  "Joel" : 32,
  "Fred" : 44,
  "Reginald" : 65,
  "Susan" : 33,
  "Julian" : 13
}, 1) ➞ {
  "Joel" : 33,
  "Fred" : 45,
  "Reginald" : 66,
  "Susan" : 34,
  "Julian" : 14
}

after_n_years({
  "Baby" : 2,
  "Child" : 8,
  "Teenager" : 15,
  "Adult" : 25,
  "Elderly" : 71
}, 19) ➞ {
  "Baby" : 21,
  "Child" : 27,
  "Teenager" : 34,
  "Adult" : 44,
  "Elderly" : 90
}

after_n_years({
  "Genie" : 1000,
  "Joe" : 40
}, 5) ➞ {
  "Genie" : 1005,
  "Joe" : 45
}

Notes

• Assume that everyone is immortal (it would be a bit grim if I told you to remove names once they reached 75).
• n should be a positive number because last time I checked, people don't tend to age backwards. Therefore, use the absolute value of n.