Given the declarations below, using the find function, write the statements to search the number string variable to determine if the sequence $"123"$ exists. The

location should be placed in the position variable

int position $=0$;

string number $="1234567890"$;

a$.$ position $=$ number.find$(123)$;

b$.$ find$("123",0)$;

c$.$ position $=$ number.find$("123",0)$;

d$.$ find$($number$("123",0),$ position$)$;