Arduino: Ultrasonic sensor HC-SR04 with LCD I2C

#include <SPI.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h> //Link of library: https://www.arduinolibraries.info/libraries/liquid-crystal-i2-c

#define BUZZER 5 //BUZZER

int trigPin = 11;    // Trigger
int echoPin = 12;    // Echo
long duration, cm, inches;

//Define LCD pinout
const int  en = 2, rw = 1, rs = 0, d4 = 4, d5 = 5, d6 = 6, d7 = 7, bl = 3;
//Define I2C Address - change if reqiuired
const int i2c_addr = 0x27;
// Define LCD display connections
LiquidCrystal_I2C lcd(i2c_addr, en, rw, rs, d4, d5, d6, d7, bl, POSITIVE);

void setup() {
  //Serial Port begin
  //Serial.begin (9600);
  //Define inputs and outputs
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  noTone(BUZZER);

    // Set display type as 20 char, 4 rows
  lcd.begin(20,4);
  // Print a message to the LCD.
  lcd.setCursor(0,0);
  lcd.print("Welcome to");
  lcd.setCursor(0,1);
  lcd.print("Ultra Sonic Sensor");
  lcd.setCursor(0,2);
  lcd.print("Distance");
  lcd.setCursor(0,3);
  lcd.print("Mesurement");
  delay(3000);
  lcd.clear();
}

void loop() {
  // The sensor is triggered by a HIGH pulse of 10 or more microseconds.
  // Give a short LOW pulse beforehand to ensure a clean HIGH pulse:
  digitalWrite(trigPin, LOW);
  delayMicroseconds(5);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  // Read the signal from the sensor: a HIGH pulse whose
  // duration is the time (in microseconds) from the sending
  // of the ping to the reception of its echo off of an object.
  pinMode(echoPin, INPUT);
  duration = pulseIn(echoPin, HIGH);

  // Convert the time into a distance
  //char cm[],inches[];
  cm = (duration/2) / 29.1;     // Divide by 29.1 or multiply by 0.0343
  inches = (duration/2) / 74;   // Divide by 74 or multiply by 0.0135
  char bufferIn[100];
  char bufferCm[100];

  Serial.print(inches);
  Serial.print("in, ");
  Serial.print(cm);
  Serial.print("cm");
  Serial.println();
  delay(250);

  lcd.setCursor(0,0);
  sprintf(bufferIn, "Distance: %d in.", inches);
  lcd.print(bufferIn);
  lcd.setCursor(0,1);
  sprintf(bufferCm, "Distance: %d cm.", cm);
  lcd.print(bufferCm);
  //lcd.setCursor(0,1);
  //lcd.print("Centimeter: %d",cm);
  //lcd.setCursor(0,2);
  //lcd.print("A-Maghulog ng barya");
  //lcd.setCursor(0,3);
  //lcd.print("B-Pumili ng Port.");
  delay(100);
  if (inches <= 54 && inches >= 33) {
    lcd.setCursor(0,3);
    sprintf(bufferIn, "Distance is LT 32in.", inches);
    lcd.print(bufferIn);
    delay(100);
      for(int i = 0; i < 5; i++)
      //for(;;)
      {
        //lcd.backlight();
        tone(BUZZER,1000);
        delay(150);
        //lcd.noBacklight();
        noTone(BUZZER);
        delay(100);
      }
  }else if (inches <= 32 && inches >= 13) {
    lcd.setCursor(0,3);
    sprintf(bufferIn, "Distance is LT 24in.", inches);
    lcd.print(bufferIn);
    delay(250);
      for(int i = 0; i < 5; i++)
        //for(;;)
        {
          //lcd.backlight();
          tone(BUZZER,500);
          delay(100);
          //lcd.noBacklight();
          noTone(BUZZER);
          delay(100);
        }
  }else if (inches <= 12) {
    lcd.setCursor(0,3);
    sprintf(bufferIn, "Distance is LT 24in.", inches);
    lcd.print(bufferIn);
    delay(100);
    tone(BUZZER,2000);
    delay(10);
  }else{
    lcd.backlight();
    lcd.setCursor(0,3);
    sprintf(bufferIn, "Distance is GT 21in.", inches);
    lcd.print(bufferIn);
    delay(100);
    noTone(BUZZER);
  }
}