A processor has 16 integer registers (R0, R1, …, R15) and 64 floating-point…

A processor has 16 integer registers (R0, R1, …, R15) and 64 floating-point registers (F0, F1, …, F63). It uses a 2-byte (16-bit) instruction format. There are four categories of instructions: Type-1, Type-2, Type-3, and Type-4. The Type-1 category consists of four instructions, each with three integer-register operands (3Rs). The Type-2 category consists of eight instructions, each with two floating-point-register operands (2Fs). The Type-3 category consists of fourteen instructions, each with one integer-register operand and one floating-point-register operand (1R + 1F). The Type-4 category consists of N instructions, each with one floating-point-register operand (1F).

The maximum value of N is __________.