Task 1: Make a sketch for interfacing of Buzzer with Arduino at pin 9. Solution: Code const int buzzer=9; void setup() { pinMode(buzzer,OUTPUT); } void loop() { tone(buzzer,3000); //Send 3KHz sound signal.... delay(5000); //....for 5 sec noTone(buzzer); // Stop sound... delay(1500); //...for 1.5s } Task 2: Flashing of 5 LED with different pattern. Solution: Code int led1=1; int led2=2; int led3=3; int led4=4; int led5=5; void setup() { pinMode(led1,OUTPUT); pinMode(led2,OUTPUT); pinMode(led3,OUTPUT); pinMode(led4,OUTPUT); pinMode(led5,OUTPUT); } void loop() { // first cycle digitalWrite(led1,HIGH); delay(500); digitalWrite(led2,LOW); delay(500); digitalWrite(led3,HIGH); delay(500); digitalWrite(led4,LOW); delay(500); digitalWrite(led5,HIGH); delay(500); // Second cycle d...