Q$3.$ Given the following grading policy, implement it by writing a nested IF statement. Assume a student's semester end total point is in the L column, and the first student is on line $2.$ Which formula is correct for the first student whose total point is on L$2.$

$0$~$60-$ D

$60$~$70-$ C

$70$~$85-$ B

$85$~$100$ A