[简答题](A) 条件(1)充分,但条件(2)不充分. (B) 条件(2)充分,但条件(1)不充分. (C) 条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分. (D) 条件(1)充分,条件(2)也充分. (E) 条件(1)和条件(2)单独都不充分,条件(1)和条件(2)联合起来也不充分. At Company R, the average (arithmetic mean) age of executive employees is 54 years old and the average age of non-executive employees is 32 years old. What is the average age of all the employees at Company R (1) There are 10 executive employees at Company R. (2) The number of non-executive employees at Company R is four times the number of executive employees at Company R.