$($b$)$ An electric heating shown in Figure Q$2($b$)$ consists of a horizontal array of $25$ thin identical metal strips. Each strip has a width of $10mm$ and a length of $0\mathrm{.}2m.$ I need answer asap

The strips are arranged side by side, forming a continuous and smooth surface $(0\mathrm{.}25m$ long and $0\mathrm{.}2m$ wide$)$ over which air flows, abong is kngh at $2\frac{m}{s}.$ If during operation, each strip is maintaned at $500C,$ whereas the an is at $25C.$ determine the rate of convective heat transfer from the fifth strip