Final answer:
To implement functions f1 and f2 using a PLA, a PLA table with input combinations and output columns for each function is specified, and an internal connections diagram with dots indicating switching elements is drawn. The PLA table and diagram need to be based on the minterms provided for both functions.
Step-by-step explanation:
To implement f1 and f2 using a Programmable Logic Array (PLA), we need to specify the PLA table, which consists of the input combinations that correspond to the minterms for each function. The minterms for f1 are 3, 6, 7, 11, 13, 14, 15 and for f2 are 3, 4, 6, 11, 12, 13, 14. Each minterm will be represented as a row in the PLA table, with the columns representing the inputs and their corresponding true (1) or complemented (0) states. Additionally, there will be output columns for f1 and f2 that indicate which minterms produce a high output for each function.
The internal connections diagram for the PLA would show the input lines, product terms, and output functions. Each intersection where a product term connects with an input or output would be indicated by a dot to represent the presence of a switching element. The actual PLA table and the internal connections diagram need to be constructed based on the specified minterms for both f1 and f2.