In the code fragment below, what is the state of the registers R4, R5, and R6 after the code fragment is executed (all numbers decimal unless otherwise specified)?

mov R0, #5

mov R1, #8

add R4, R0, R1

mul R5, R4, R1

sub R6, R5, R0

R4 = 13 R5 = 104 R6 = 99

R4 = 99 R5 = 104 R6 = 13

R4 = 13 R5 = 14 R6 = 98

R4 = 1 R5 = 4 R6 = 9