Your colleague left a component incomplete.
Let’s complete it. All that’s left to do is add a button.
Add a standard button Button, the text on the button should be ‘CLick me’.
When the button is clicked, the handleTouch method must be called.

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App.js

import React, { Component } from 'react';
import { StyleSheet, View } from 'react-native';

export default class App extends Component {
  state = {
    touches: 0,
  };

  handleTouch = () => {
    this.setState(({ touches }) => ({ touches: touches + 1 }));
  }

  render() {
    return (
      <View style={styles.container}>
      </View>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#56c7c0',
    alignItems: 'center',
    justifyContent: 'center',
  },
});

app.json

{
  "expo": {
    "name": "1",
    "slug": "1",
    "version": "1.0.0",
    "orientation": "portrait",
    "icon": "./assets/icon.png",
    "splash": {
      "image": "./assets/splash.png",
      "resizeMode": "contain",
      "backgroundColor": "#ffffff"
    },
    "updates": {
      "fallbackToCacheTimeout": 0
    },
    "assetBundlePatterns": [
      "**/*"
    ],
    "ios": {
      "supportsTablet": true
    },
    "android": {
      "adaptiveIcon": {
        "foregroundImage": "./assets/adaptive-icon.png",
        "backgroundColor": "#FFFFFF"
      }
    },
    "web": {
      "favicon": "./assets/favicon.png"
    }
  }
}