Which are the correct IUPAC names of the following compound?;(i) 5– Butyl – 4– isopropyldecane (ii) 5– Ethyl – 4– propyldecane (iii) 5– sec-Butyl – 4– iso-propyldecane (iv) 4–(1-methoxymethyl)– 5 – (1-methyl propyl)-decane