A PHP Error was encountered Severity: Notice Message: Undefined variable: persona

I am getting the above error and I am really not sure where I am going wrong. I am using Codeigniter framework. Following is my code:

Controller:

public function createtask()
      {
      
  $this->load->model('persona_model');
    $data['persona']=$this->persona_model->view();
                  $this->load->view('createtask_view', $data);
            }

Model:

function view()
      {
          $this->db->select('*');
          $this->db->from('persona');
          $query = $this->db->get();
          if($query->num_rows()>0){
          return $query->result();
          }else{
              return $query->result();
          }
      }


view:
                <table class="table">
                <thead>
              <tr>
                <th>Persona ID </th>
                <th>Firstname </th>
                <th>Lastname</th>
                </tr>
                </thead>
                <tbody>
                  <?php
                  foreach($persona as $row)
                {
                      ?>
                      <tr>
                      <td><?php echo $row->personaid; ?></td>
                      <td><?php echo $row->firstname; ?></td>
                      <td><?php echo $row->lastname; ?></td>
                  <?php      }
                  ?>
                   </tbody>


Kindly help I have been looking into this since a long time.