android studio shows a error.

i tried changing the viewmodel name and how its instantiated ie val myViewModel5 by viewModels<MyViewModel>()

                package com.example.myapplication
                
                import android.os.Bundle
                import androidx.activity.ComponentActivity
                import androidx.activity.compose.setContent
                import androidx.activity.viewModels
                import androidx.compose.foundation.layout.fillMaxSize
                import androidx.compose.material3.MaterialTheme
                import androidx.compose.material3.Surface
                import androidx.compose.material3.Text
                import androidx.compose.runtime.Composable
                import androidx.compose.ui.Modifier
                import androidx.compose.ui.tooling.preview.Preview
                import androidx.lifecycle.ViewModel
                import androidx.lifecycle.ViewModelProvider
                import com.example.myapplication.ui.theme.MyApplicationTheme
                class simpleViewModel: ViewModel(){
                    val abc=1;
                }
                class MainActivity : ComponentActivity() {
                    override fun onCreate(savedInstanceState: Bundle?) {
                        super.onCreate(savedInstanceState)
                        val myViewModel by viewModels<simpleViewModel>()
                        setContent {
                            MyApplicationTheme {
                                // A surface container using the 'background' color from the 
                                Surface(
                                    modifier = Modifier.fillMaxSize(),
                                    color = MaterialTheme.colorScheme.background
                                ) {
                                    app(ViewModelProvider(this).get(simpleViewModel::class.java))
                                }
                            }
                        }
                
                
                    }
                }
                
                @Composable
                fun app(v:ViewModel) {
                    Text(v.abc)
                
                }

but dont matter what i do i cant use the member of the viewmodel. shoud i use a simgle functon for the whole app?