C programming help

1. Which of the following are valid variable names in C? a. char b. limit7e c. 1234 d. count_of apples_in_one_basket e. $2000_address_for_input 2. Please write the output of the following code segments: r=x%y; printf( "q = r); %d ", 8; %d, r q, = b, int x -30, y = double q x / (double) y; printf("q 1f ", q); C. Char x= 'T', r; printf("r = %c ", r); d, int x=2; switch (x) f case 3 printf("Level A! "); break; printf( "Level B!n); printf("Level C! ") case 2: case 1: break; int x 3; while (x >= 0) { if(x % 2 == 0) else if (x *xx) printf("%d is even ", x); printf("%d is odd ", x); break