4. Given the following empty-stack PDA, (15 points; 8 points for the first 8 blanks) c,Y c.C cd pushCc) push(c) pop A,Y Start pop push(d) 'push(d) ' pop the language L accepted by the empty-stack PDA is the set of strings over the alphabet (c, dl such that each string has the same number of c's and d's. To transform the PDA into a C-F grammar, for each type of the PDA instructions, we need to construct the corresponding grammar productions. In the following, we list the PDA instructions on the left and you put the corresponding grammar productions in the blanks on the right. We start with Type 4. 4. Given the following empty-stack PDA, (15 points; 8 points for the first 8 blanks) c,Y c.C cd pushCc) push(c) pop A,Y Start pop push(d) 'push(d) ' pop the language L accepted by the empty-stack PDA is the set of strings over the alphabet (c, dl such that each string has the same number of c's and d's. To transform the PDA into a C-F grammar, for each type of the PDA instructions, we need to construct the corresponding grammar productions. In the following, we list the PDA instructions on the left and you put the corresponding grammar productions in the blanks on the right. We start with Type 4