Mena is at the gym. a) She will use each of these pieces of equipment once. Stepper (S) Treadmill (T) Bike (B) Rower (R) Mena will use the stepper first. List all the possible orders in which she could use the four pieces of equipment. The first order has been done for you, please list the rest in the same way. STBR, (2) b) The table shows how long Mena spends on each piece of equipment. Stepper 11 minutes Mena starts on the stepper at 1.55 pm She has a break of 3 minutes between Treadmill 15 minutes pieces of equipment. Bike 48 minutes What time does she finish on her last piece Rower 1 hour 25 minutes of equipment? (3)