$$David consumes two things: gasoline $($G$)$ and bread $($B$).$ David$$s utility function is U$($q$1,$ q$2)=10$q$1^1\mathrm{.}25$q$2^02\mathrm{.}75.$ Derive David$$s demand curve for gasoline. f the price of gasoline rises, how much does David

reduce his consumption of gasoline, dq $1/$dp $?$