The general registrar shall provide at each polling place on election day, for the voting system in use, a model of or materials displaying a portion of its ballot face. The model or materials shall be located on the table of one of the officers or in some other place accessible to the voters. An officer of election shall instruct any voter who requests instruction before voting on the proper manner of voting. The officer may direct the voter’s attention to sample ballots so that the voter may become familiar with the location of questions and names of offices and candidates. For ballot scanner machines, an officer of election, using a demonstration ballot and machine, shall show each voter who requests, immediately on entry to the polling place, the manner in which the ballot is to be voted. If any voter, after entering the voting booth, asks for further instructions concerning the manner of voting, two of the officers from different political parties shall give such instructions to him, but no officer shall in any manner request or seek to persuade or induce any such voter to vote for or against any particular ticket, candidate, or question. After giving such instructions and before the voter votes, the officers shall leave the voting booth, and the voter shall cast his ballot in secret.