Q$1$: Provide the runtime $($big O$)$ for each part below

a$)$ assume $"$b$"$ below is the input variable to the function, $"$a$"$ is constant

result $=0$

for i from $1$ to $b$ :

result $=$ result $+a$

$($b$)"$a$"$ and $"$b$"$ below are the input variable to the function

$x=0$

while $ab$ :

$a=a-b$

$x=x+1$