Answer 1

I made a few little changes to the second answer to make it show 2 alerts without using if-statements:

let age = prompt("input your age");
let year = 2019 - age;
let answers = !age ? ["Please enter a number"] : year > 120 ? ["InA", "YoP"] : ["You were born in " + year];
answers.forEach(alert);

The changes include:
- Replaced expression evaluating to a single string to one evaluating to an Array of string
- renamed answer to answers to correspond with it potentially being multiple strings.
- Replaced single alert with answers.forEach(alert) so alert would be called on each and every string.
- I removed the `${ characters because the template literal doesn't seem helpful there.