Pass the parameter In api Url

mobileTracker(data){
   return this.http.get("http://apilayer.net/api/validate?     access_key=afa4dd92163c383b3f590d35bd39e9a0&number="+`${data.mobile_number}`+" &country_code="+`${data.counrty_code}`+"&format="+1);  
   }