Ubuntu – What Package is ‘/usr/sbin/apache2’ part of

After I installed Apache trough the command sequence you can find below, it gave me an error: /usr/sbin/apache2ctl: 171: /usr/sbin/apache2ctl: /usr/sbin/apache2: not found. After some Googling I found out that it's part of a dependency of Apache2, which apparently is missing. Does anyone know which dependency that is?

Command Sequence:

sudo apt-get install apache2.2-common
sudo apt-get install apache2
sudo apache2ctl start -k

After some more Googling I figured I should try sudo service apache2 start which gives me the error: No apache MPM package installed. I tried to install that package by using the command sudo apt-get install apache2-mpm-prefork. I posted the results of that here.

Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be REMOVED:
  apache2-mpm-worker
The following NEW packages will be installed:
  apache2-mpm-prefork
0 upgraded, 1 newly installed, 1 to remove and 0 not upgraded.
Need to get 0 B/2.398 B of archives.
After this operation, 0 B of additional disk space will be used.
Do you want to continue [Y/n]? Y
dpkg: apache2-mpm-worker: dependency problems, but removing anyway as you requested:
 apache2 depends on apache2-mpm-worker (= 2.2.22-1ubuntu1.4) | apache2-mpm-prefork (= 2.2.22-1ubuntu1.4) | apache2-mpm-event (= 2.2.22-1ubuntu1.4) | apache2-mpm-itk (= 2.2.22-1ubuntu1.4); however:
  Package apache2-mpm-worker is to be removed.
  Package apache2-mpm-prefork is not installed.
  Package apache2-mpm-event is not installed.
  Package apache2-mpm-itk is not installed.
(Reading database ... 267257 files and directories currently installed.)
Removing apache2-mpm-worker ...
No apache MPM package installed
Selecting previously unselected package apache2-mpm-prefork.
(Reading database ... 267251 files and directories currently installed.)
Unpacking apache2-mpm-prefork (from .../apache2-mpm-prefork_2.2.22-1ubuntu1.4_amd64.deb) ...
Setting up apache2-mpm-prefork (2.2.22-1ubuntu1.4) ...
No apache MPM package installed