task 2

export default function (data) {
let result = {}

let {keys,first,second}=data;

for(const item of keys){
  result[item]=null;
}

for(const key in first){

  if(keys.includes(key)){
      if(result[key] === null){
          result[key]= [first[key]]
      }else{
          result[key].push(first[key])
      }
    }
  }

  for(const key in second){

    if(keys.includes(key)){
        if(result[key] === null){
            result[key]= [second[key]]
        }else{
            result[key].push(second[key])
        }
      }
    }

    for(const key in result){
      if(result[key] != null && result[key].length === 1){
        result[key] = result[key][0]
      }
    }

return result;
}