Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
Hanna has twice as many erasers as Rachel.  Rachel has three less than one-half as many erasers as Tanya has red erasers.  If Tanya has 20 erasers, and half of them are red, how many erasers does Hanna have?

### Response:
 Tanya ana erasers 20/2=<<20/2=10>>10 nyekundu.
Nusu ya erasers kama Tanya ana erasers nyekundu ni 10/2=<<10/2=5>>5 erasers.
Nusu ya erasers kama Tanya ana erasers nyekundu, minus 3, ni 5-3=2 erasers.
Rachel ana erasers hizi: 2
Hanna ana mara mbili ya erasers kama Rachel, kwa jumla ya erasers hizi: 2*2=<<2*2=4>>4.