て[下「くだ」]さる => Do for someone N4
Give and take advice
[以下「いか」] => Less than A, under/below A (amount) N1
Degree/ Level/Amount
て下さいませんか => Please do A (polite) N5
Asking and Telling
[下「くだ」]さる => Give B to A (A is you, your friends, your family, etc.) N4
Give and take advice
へ => Go to N, head to N , Often followed by verbs like 行く/いく, 来る/くる, 向かう/むかう… N5
Particles