Displaying multiple columns in single carousel item with Bootstrap carousel - css

Question

So I am able to have four columns in single item at a time , but when I implement 'carousel' class (4th div in html file) then the first two item displays fine. But in the last item as it should only have 2 columns with task name 9 and 10, instead task name 1 and 5 are also displayed there.
if I don't implement carousel class then data displays fine but carousel buttons stops working.
' I've already tried different solutions provided on stack overflow. '
here is my HTML file
<!-- my tasks -->
<div class="row mt-3 mb-3">
<div class="col-md-12">
<!-- carousel -->
<div class="row mx-auto my-auto">
<div id="myTaskDiv" class="carousel slide w-100" data-ride="carousel">
<div class="carousel-inner w-100">
<!-- carousel item -->
<div class="carousel-item {{ i == 0 ? 'active' : '' }}" *ngFor="let chunkMyTask of productData ;let i =index;">
<!--widget-->
<div class="col-sm-6 col-md-4 col-lg-3" *ngFor="let myTask of chunkMyTask">
<div class="widget border">
<div class="widget-body">
{{myTask.name}}
</div>
</div>
<!--widget end-->
</div>
<!-- carousel item end-->
</div>
</div>
<!-- carousel controls -->
<a class="carousel-control-prev" role="button" href="#myTaskDiv" data-slide="prev">
<i class="fa fa-angle-left fa-3x" aria-hidden="true"></i>
<span class="sr-only">Previous</span>
</a>
<a class="carousel-control-next" role="button" href="#myTaskDiv" data-slide="next">
<i class="fa fa-angle-right fa-3x" aria-hidden="true"></i>
<span class="sr-only">Next</span>
</a>
<!-- carousel controls end-->
</div>
<!-- carousel end -->
</div>
</div>
<!-- my tasks end-->
then this below is my .ts file
import { Component, OnInit } from '#angular/core';
import { task } from '../task';
import { TasksService } from '../tasks.service';
import { MyTaskServiceService } from 'src/app/dashboard/my-tasks/my-task-service.service';
#Component({
selector: 'app-my-tasks',
templateUrl: './my-tasks.component.html',
styleUrls: ['./my-tasks.component.css']
export class MyTasksComponent {
title = 'Carousel';
productData: any;
private myTasks: any;
private myTaskArray: any;
constructor(private myTaskService: MyTaskServiceService) { }
chunks(array, size) {
let results :any;
results = [];
while (array.length) {
results.push(array.splice(0, size));
this.num=this.num+1;
}
return results;
}
ngOnInit() {
this.myTaskService.get_New_Products().subscribe(
data => {
this.productData = this.chunks(data.json(), 4);
console.log(this.productData);
});
}
}
And at last this below is my json file:
[
{
"taskType": "myTask",
"name": "Task 1"
},
{
"taskType": "myTask",
"name": "Task 2"
},
{
"taskType": "myTask",
"name": "Task 3"
},
{
"taskType": "myTask",
"name": "Task 4"
},
{
"taskType": "myTask",
"name": "Task 5"
},
{
"taskType": "myTask",
"name": "Task 6"
},
{
"taskType": "myTask",
"name": "Task 7"
},
{
"taskType": "myTask",
"name": "Task 8"
},
{
"taskType": "myTask",
"name": "Task 9"
},
{
"taskType": "myTask",
"name": "Task 10"
}
]