$9.$ Consider the following CUDA kernel and the corresponding host function

that calls it:

$01$

N$)\{$

$02$

x;

$03$

$04$

$05$

$06$

$07$

$08$

$09$

b$\_$d$,$ N$)$;

$10$

$\_\_$global$\_\_$ void foo$\_$kernel$($float a$,$ float b$,$ unsigned int

unsigned int i$=$blockIdx.x blockDim.x $+$ threadIdx.

if$($i $,$ N$)\{$

b$[$i$]=2\mathrm{.}7$f a$[$i$]-4\mathrm{.}3$f;

$\}$

$\}$

void foo$($float a$\_$d$,$ float b$\_$d$)\{$

unsigned int N$=200000$;

foo$\_$kernel $,,,($N $+1281)/128,128...($a$\_$d$,$

$\}$

a$.$ What is the number of threads per block?

b$.$ What is the number of threads in the grid?

c$.$ What is the number of blocks in the grid?

d$.$ What is the number of threads that execute the code on line $02?$

e$.$ What is the number of threads that execute the code on line $04?$