is the injection profile statements aggregate on non aggregate?

Gatling (Open-Source)
1

I’m new to Gatling and have two basic questions down below. Given the following code snippet:

/*  1. pause for 5 seconds.
    2. Injects 10 users at once.
    3. Injects 10 users with a linear ramp over 5 seconds
    4. Injects users at 20 users per second during a 15 second interval.
       Users will be injected at regular intervals.
    5. Injects users at 20 users per second during a 15 second interval.
       Users will be injected at randomized intervals.
    6. Injects users from 10 ups to 20 ups, during a 10 second interval.
       Users will be injected at regular intervals.
    7. Injects users from 10 ups to 20 ups, during a 10 second interval.
       Users will be injected at randomized intervals.
    8. Injects 1000 users over a smooth approximation during a 20 second interval.
*/

setUp(
  scn.inject(
    nothingFor(5), // 1
    atOnceUsers(10), // 2
    rampUsers(10) during (5), // 3
    constantUsersPerSec(20) during (15), // 4
    constantUsersPerSec(20) during (15) randomized, // 5
    rampUsersPerSec(10) to 20 during (10), // 6
    rampUsersPerSec(10) to 20 during (10) randomized, // 7
    heavisideUsers(1000) during (20) // 8
  ).protocols(httpConf))



Question #1: Regarding atOnceUsers(10) and rampUsers(10), are they the same 10 users or are they an aggregate of 20 users?

Question #2: Regarding constantUsersPerSec(20), are these users 20 new users or an aggregate of the prior two statements referred to in my prior question?
2 
Question #1: aggregate of 20 users
3

Thanks G Madhana Mohana Reddy.