Find the correct statement(s) about the CPU?CPU is considered as the brain of the computerOperating system loads in to the CPU from the hard disk when you first switched on the computerIt performs most of the computer calculationsIt is responsible for the smooth running of your operating systemIt is responsible for the smooth running of your application software

The correct statements about the CPU (Central Processing Unit) are:

1. CPU is considered as the brain of the computer: This is correct. The CPU is the primary component of a computer that performs most of the processing inside the computer. It's often referred to as the "brain" of the computer because it carries out the instructions of a computer program by performing basic arithmetical, logical, control and input/output (I/O) operations.

2. It performs most of the computer calculations: This is also correct. The CPU performs most of the mathematical calculations that enable a computer to function.

3. It is responsible for the smooth running of your operating system: This is partially correct. While the CPU does execute the instructions of the operating system, the "smooth running" of the operating system also depends on other factors like the operating system's design and the computer's memory and storage.

4. It is responsible for the smooth running of your application software: This is also partially correct. The CPU does execute the instructions of application software, but the "smooth running" of such software also depends on other factors like the software's design and the computer's memory and storage.

The statement "Operating system loads into the CPU from the hard disk when you first switched on the computer" is not correct. When you first switch on the computer, the operating system is loaded into the computer's RAM (Random Access Memory), not the CPU. The CPU then processes the instructions contained in the operating system.