$($a$)$ Write an Arduino program that will rotate a DC motor via switching on and off that is connected to digital pin $11,$ when pressing a pushbutton attached to pin $2.$

$($b$)$ Write an Arduino program to perform the following activity:

A humidity controller which consists of a humidity sensor that will detect the surrounding humidity being used along with Arduino Uno microcontroller which is used to obtain the furnace's environmental conditions. It also contains a DC blower and a light emitting diode $($LED$)$ which is connected to digital pin $7$ and $12,$ respectively. The code is defined totreceive the analog signal of the humidity sensor from pin A$0.$ For humidity of the surrounding is above $65\%$ humidity, the blower and the LED will be in the OFF state, and if the surrounding humidity drop below $65\%$ humidity, the microcontroller will turn ON the blower and LED. The sensor will keep on sensing the humidity until it is above $65\%$ humidity and then the blower and LED will be turn off. Write and fill in the highlighted program codes based on the instructions given below: